Sounds good.  But yep- the ability to re-sync audio (usually thrown out by 25 or so frames by YouTube, over the years) and to add new audio (perhaps not from the audio-swap libary which does NOT contain the original video tracks, obviously and NO- not everyone wants a totally instrumental soundtrack, overriding ambient sound on the original!) from within one's own system.  For example- let us edit out the copyrighted music, leave in place the video's own ambient sound and THEN overlay it with acceptable audio (from audio swap and/or Kevin McLeod).

:)

Otherwise keep going- sounds like some nice things are coming out of the mess that is the current site.

(still intensely dislike the comment section- such a mess!)