Corner brackets drawing themselves around the frame, with a tag pill dropping onto the edge.
For a clip you want other people to film on top of — the prompt that turns a post into a format. The brackets frame the viewer’s own footage rather than your content, which makes this one of the few overlays that is about the empty space in the middle. Say what the background is for, not just that it exists.
Say what the background is for in the label, not just that it exists: USE THIS FOR YOUR RANKING or REACT TO THIS. The bracket colour is the accent. The brackets frame the viewer's footage rather than yours, so the middle should be empty.
Green Screen Prompt is built at 640 × 360, a 16:9 landscape frame, the shape of a YouTube video, a stream layout and most editing timelines, and runs 3 seconds at 30 frames per second. It arrives in 0.3 seconds, holds for 1.8 and clears in 0.9, so cue it a beat before the moment it labels. Export it as an MP4 for a timeline or a feed, a GIF where video will not embed, or a MOV with an alpha channel to lay it over footage with nothing behind it. Renders go up to 4K, and the free plan exports at 720p with a watermark.
Because the overlay is about the viewer's own footage. The brackets mark the space they will fill, which is what tells them the clip is a format to use.
It says whatever you type. USE THIS BACKGROUND is the default. Write it as the platform phrases the effect if you want it to read as an instruction.
