01
It begins as noise.
Demo sequence. Every frame of this is chosen by where you are on the page — scroll up and it runs backwards, stop and it stops.
02
Then it resolves.
The picture is a video, seeked rather than played, so the whole thing is one request instead of a hundred and forty.
03
And it arrives.
Swap in your own footage with bin/sequence.mjs, or switch the section to Frames if it has to be exact on every device.