Hmm, higher resolution videos (like 4K or 1080p) take longer to both upload and process. If the processing time has been stuck for 8 hrs or more, try deleting the video and re-uploading it. Tweet back @ us if that doesn't work.
Have you tried doing it on a different browser? Also, try clearing cache/cookies, restarting your PC and reconnecting to the internet. If these steps doesn't fix the issue, we recommend you submit feedback here: https://yt.be/help/feedback Hope this helps!
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