--- title: "BlitzReels Video Glossary" canonical: "https://blitzreels.com/glossary" --- # BlitzReels Video Glossary Definitions for AI video, captions, short-form editing, social formats, and production workflows. Human page: https://blitzreels.com/glossary ## Terms - [Faceless Video](https://blitzreels.com/glossary/faceless-video.md): A faceless video is a video in which the creator does not appear on camera. Screen recordings, stock or original footage, animation or AI visuals carry the story, usually with a voiceover, captions or on-screen text. AI and narration are both optional. - [Text-to-Video](https://blitzreels.com/glossary/text-to-video.md): Text-to-video is an AI capability that converts written text descriptions into video clips, generating visuals, motion, and scene composition from natural language prompts. - [Vertical Video](https://blitzreels.com/glossary/vertical-video.md): Vertical video is video that is taller than it is wide. The most common size is 1080 x 1920 pixels, a 9:16 aspect ratio that fills a phone held upright. 4:5 is vertical too. - [AI Captions](https://blitzreels.com/glossary/ai-captions.md): AI captions are automatically generated text overlays synchronized to spoken audio in a video, created using speech recognition AI that transcribes audio and places text with word-level timing. - [B-Roll](https://blitzreels.com/glossary/b-roll.md): B-roll is supplementary footage used to visually support the main narrative of a video, providing visual variety while voiceover or dialogue continues over the cut. - [Video Clipping](https://blitzreels.com/glossary/video-clipping.md): Video clipping is the process of extracting short, high-value segments from longer video content for distribution as standalone clips on social media platforms. - [Aspect Ratio](https://blitzreels.com/glossary/aspect-ratio.md): Aspect ratio is the proportional relationship between a video's width and height, expressed as two numbers separated by a colon (e.g., 16:9 for landscape, 9:16 for vertical, 1:1 for square). - [SRT Subtitles](https://blitzreels.com/glossary/srt-subtitles.md): SRT (SubRip Text) is a plain-text subtitle file format that stores timed text with sequence numbers, timestamps, and subtitle content for displaying text over video. - [Video Compression](https://blitzreels.com/glossary/video-compression.md): Video compression is the process of reducing video file size by removing redundant visual data using codecs, while maintaining acceptable visual quality for the intended use. - [Content Repurposing](https://blitzreels.com/glossary/content-repurposing.md): Content repurposing is the strategy of adapting a single piece of content into multiple formats and platforms to maximize reach and ROI from one production effort. - [Codec](https://blitzreels.com/glossary/codec.md): A codec is a software algorithm that encodes raw video data into a compressed format for storage or transmission, and decodes it for playback. Common video codecs include H.264, H.265 (HEVC), VP9, and AV1. - [Bitrate](https://blitzreels.com/glossary/bitrate.md): Bitrate is the amount of data used to represent each second of video, measured in kilobits per second (Kbps) or megabits per second (Mbps). Higher bitrate generally produces better video quality at the cost of larger file size. - [Safe Zone](https://blitzreels.com/glossary/safe-zone.md): A video safe zone is the part of the frame that app buttons, descriptions and cropping leave clear, so faces and text stay visible. On a 1080 x 1920 frame, TikTok's in-feed ad template keeps the top 240 and bottom 660 pixels out of it. - [Video Reframing](https://blitzreels.com/glossary/video-reframing.md): Video reframing is the process of changing a video's aspect ratio by intelligently cropping or repositioning the frame, typically to convert horizontal 16:9 footage into vertical 9:16 for short-form platforms. - [Jump Cut](https://blitzreels.com/glossary/jump-cut.md): A jump cut is an abrupt edit that cuts between two shots of the same subject from nearly identical camera angles, creating a jarring visual discontinuity or rapid time compression effect. - [Hook](https://blitzreels.com/glossary/hook.md): A hook is the opening 1-3 seconds of a short-form video, designed to immediately capture viewer attention and prevent scrolling past the content. - [Audiogram](https://blitzreels.com/glossary/audiogram.md): An audiogram is a video format that visualizes audio content as a static or animated image with a waveform visualization, used to share podcast clips, music, or spoken word content on social media platforms that require video. - [Motion Graphics](https://blitzreels.com/glossary/motion-graphics.md): Motion graphics are animated graphic design elements used in video, including moving text, logos, icons, transitions, lower thirds, charts, and callouts that explain or emphasize information on screen. - [Keyframe](https://blitzreels.com/glossary/keyframe.md): A keyframe is a defined point in a video timeline that specifies the value of an animation parameter (position, scale, opacity, color) at that moment, with the software interpolating values between keyframes. - [Voiceover](https://blitzreels.com/glossary/voiceover.md): A voiceover is narration recorded separately from the visuals and laid over the video during editing, so the speaker does not need to appear on screen. - [AI Model](https://blitzreels.com/glossary/ai-model.md): An AI model is a machine learning system trained on large datasets to perform a specific task, such as generating video from text, transcribing audio, synthesizing speech, or analyzing content. - [Watermark](https://blitzreels.com/glossary/watermark.md): A watermark is a semi-transparent or opaque overlay embedded in a video that identifies the content's source, brand, or creator, typically as a logo, text, or combined mark. - [Frame Rate](https://blitzreels.com/glossary/frame-rate.md): Frame rate is the number of still images a video shows per second, measured in frames per second (fps). Common rates are 24, 30 and 60 fps. - [YouTube Shorts](https://blitzreels.com/glossary/youtube-shorts.md): YouTube Shorts is YouTube's short-form vertical video format for videos up to 60 seconds long, displayed in a dedicated Shorts feed and distributed by YouTube's recommendation algorithm to non-subscribers. - [Instagram Reels](https://blitzreels.com/glossary/instagram-reels.md): Instagram Reels is Instagram's short-form vertical video format for videos up to 90 seconds, distributed through a dedicated Reels feed and Instagram's Explore page to reach audiences beyond existing followers. - [Highlight Detection](https://blitzreels.com/glossary/highlight-detection.md): Highlight detection is software that scans a long video and picks out the moments most likely to work as short clips. - [Thumbnail](https://blitzreels.com/glossary/thumbnail.md): A thumbnail is a small preview image that represents a video, displayed on platforms like YouTube, TikTok, and Instagram before a viewer clicks to watch. - [16:9 Aspect Ratio](https://blitzreels.com/glossary/aspect-ratio-16-9.md): 16:9 is a widescreen aspect ratio: 16 units wide for every 9 units high. In pixels, the common 16:9 sizes are 1280 x 720, 1920 x 1080, 2560 x 1440 and 3840 x 2160. - [9:16 Aspect Ratio](https://blitzreels.com/glossary/aspect-ratio-9-16.md): 9:16 is the vertical video aspect ratio used for TikTok, Instagram Reels, YouTube Shorts, and Snapchat, measuring 9 units wide by 16 units tall. - [Auto Caption](https://blitzreels.com/glossary/auto-caption.md): Auto captions are captions that speech recognition software creates from a video's audio, with no manual typing. - [Burned-In Captions](https://blitzreels.com/glossary/burned-in-captions.md): Burned-in captions (also called hardcoded or open captions) are text overlays permanently embedded into the video pixels, visible to all viewers without toggles. - [Closed Captions](https://blitzreels.com/glossary/closed-captions.md): Closed captions (CC) are on-screen text of a video's dialogue and important sounds that the viewer can turn on or off. - [Image-to-Video](https://blitzreels.com/glossary/image-to-video.md): Image-to-video is an AI capability that animates a static image into a video clip, adding motion, camera movement, and scene dynamics based on the source image and optional text guidance. - [Lip Sync](https://blitzreels.com/glossary/lip-sync.md): Lip sync in video production is the synchronization of a character's or person's lip movements with an audio track, either naturally filmed or generated by AI. - [Video Stabilization](https://blitzreels.com/glossary/video-stabilization.md): Video stabilization is a technique that reduces unwanted camera shake and jitter in footage, producing smoother motion through hardware gimbal systems or software post-processing. - [Crop](https://blitzreels.com/glossary/crop.md): Cropping is the process of removing portions of a video or image frame to change its composition, aspect ratio, or to focus on a specific area of the content. - [Watch Time](https://blitzreels.com/glossary/watch-time.md): Watch time is the total amount of time viewers spend watching a video, measured as both absolute duration and as a percentage of the video's total length (retention rate). - [Background Music](https://blitzreels.com/glossary/background-music.md): Background music is audio played underneath the primary content of a video (narration, dialogue, or ambient sound) to set mood, pace, and emotional tone. - [Video Analytics](https://blitzreels.com/glossary/video-analytics.md): Video analytics are metrics and data insights about how viewers interact with video content, including views, watch time, retention curves, engagement rate, and audience demographics. - [Dubbing](https://blitzreels.com/glossary/dubbing.md): Dubbing is the process of replacing or adding a new audio track in a different language over existing video footage, enabling multilingual content distribution. - [Video Overlay](https://blitzreels.com/glossary/video-overlay.md): A video overlay is any text, image, graphic or video clip placed on top of your main footage. - [Video Montage](https://blitzreels.com/glossary/video-montage.md): A video montage is a sequence of short clips edited together to show a lot in little time, such as a trip, a training block or a season of highlights. - [1:1 Aspect Ratio](https://blitzreels.com/glossary/aspect-ratio-1-1.md): 1:1 is a square aspect ratio: the width and height are equal. A common size is 1080 x 1080 pixels. - [Noise Reduction](https://blitzreels.com/glossary/noise-reduction.md): Noise reduction is the process of removing unwanted background noise from video audio tracks, improving clarity and professionalism of spoken content. - [A/B Testing](https://blitzreels.com/glossary/a-b-testing.md): A/B testing for video means showing different versions of a title, thumbnail or hook to compare which one performs better. - [Video Podcast](https://blitzreels.com/glossary/video-podcast.md): A video podcast is a podcast episode recorded with video cameras in addition to audio, distributed as both audio-only and video content across podcast and video platforms. - [4K Video](https://blitzreels.com/glossary/4k-video.md): 4K video has a resolution of 3840 x 2160 pixels (4K UHD), four times as many pixels as 1080p. Cinema 4K is slightly wider, at 4096 x 2160.