[ESA] Submitted VODs do not show up

[qixils]

This is due to me treating user-submitted VODs the same as automatically generated VODs, the latter of which are supposed to be hidden in favor of ESA's manual VOD links since the auto VODs use links to temporary Twitch broadcast archives.

One idea for fixing this going forwards is to assign a hardcoded submitter ID to automatically generated VODs and delete them after two weeks (or whatever Twitch's broadcast retention is) and hide them after ESA adds a manual VOD link to their schedule. Not immediately sure how to retroactively apply this, I guess just marking all Twitch VODs currently present on the two recent ESA events as being from ESA is probably fine. Should be easy to do after DB migration, so I'm considering this partially blocked by #59.