Update on the TAS:
libTAS fixed the bug where restarting a game would also reset the clock back to 1 second after midnight on January 1st 1970 (UTC).
Since TASVideos doesn't accept movies that require prerelease versions of libTAS, this means it's now my job to resynchronize the TAS.
This will probably involve a lot of changes to movement within fights in Right Undertale, which I will hopefully be able to do without much modification to the rest, but I may end up having to throw out everything after the end of Deltarune and redo it.
I'm going to export the current 90 minutes of the TAS to see how hilariously desynchronized it gets. Who knows - maybe it won't desync at all somehow.