Transparency built into the file
Every video pixel has color information (red, green, blue) and, optionally, an alpha value that controls opacity. When alpha is fully transparent, you see the layer underneath—your main video, game capture, or webcam feed.
Videohead exports overlays with a native alpha channel so backgrounds are already transparent. You drag the file into DaVinci Resolve, CapCut Desktop, Premiere Pro, or OBS Studio and composite it like any other clip.
Alpha channel vs green screen (chroma key)
Chroma key removes a solid color (usually green) in post. It works, but edges can fringe, spill color onto skin, and break when lighting changes.
Alpha-channel video skips that step. The transparency is encoded in the file—cleaner edges, faster workflow, and no guesswork with spill suppression or matte finesse.
- Alpha: transparency stored per pixel; no keying required
- Chroma key: editor removes a color range; needs tuning per shot
- Videohead outputs alpha-ready WebM or MOV for modern NLEs and OBS
Where alpha overlays show up in real edits
Lower thirds and name tags on interviews, subscribe CTAs on YouTube outros, promo badges on UGC ads, stream alerts in OBS, and kinetic text on Shorts—all are typical overlay layers that benefit from true alpha.
If you generate overlays in Videohead, export with transparency enabled, and place the clip on a track above your base video, the alpha channel does the compositing for you.
Key takeaways
- Alpha channel = per-pixel transparency in the video file
- Native alpha avoids green-screen keying and messy edges
- Videohead exports WebM or MOV with alpha for major editors and OBS
- Place alpha overlays on a track above your footage—no extra effects required