Hey back, video processing shouldn't take longer than a few hours at most (and may be longer for higher res formats). How long has yours been showing that it's still processing? Here's a few tips for videos stuck in upload too: https://yt.be/help/x21i
Sorry to hear you're still having trouble. We'd recommend sending a feedback report directly from YouTube, here's how: https://yt.be/help/feedback . Make sure to send from the account experiencing the issue!