my guess is the url is a hash of the video upload time, username , video length (is deterministic) so he uploaded 100 (or 1000) and kept the one that worked ti

my guess is the url is a hash of the video upload time, username , video length (is deterministic) so he uploaded 100 (or 1000) and kept the one that worked tip: if you see something magic it's usually just dilligence in disguise. (like the Prestige)