We are working on some improvements for this Queued system but as of now, generally the videos that get stuck on Queued are videos that could Fail after 48h if they didn’t change to “Processing” before.
We’ve just introduced 950 additional channels which can make the queue take longer sometimes. For now, if you get a video on “Queue” for a few hours, you could watch another video from the same or another creator and ensure that one shows as “Processing” so that you can make sure your reward will be recorded for that day.