Anyway, I recently finished uploading some music from the Super Lucky's Tale soundtrack to YouTube since not every song had been uploaded yet. I also included a download link in my videos' descriptions for all the songs I ripped (which should be every track in the game) since nobody else bothered to make a download for the game's music (there isn't even an official soundtrack despite the devs saying it's "coming" for months). With that egregious wrong righted, I can go back to making covers of the GBC Animorphs soundtrack.
It took a while, but the mod figured out what was happening with my posts: the filter removed all posts with a YouTube link. I was able to get my posts through this time, so I'm happy.