Not only that, but moving a video to a collection takes more clicks (5) than just deleting it (3). Add in the 3 clicks plus typing a name to create the collection, and then 3 more clicks at the end to delete the collection, and it's significantly more work to move everything to a collection and delete the collection than to just delete each video individually.
Going forward I guess I'll start putting videos in collections when I upload them to make bulk deleting easier. (I do a short weekly overview for each class, so I build up a lot of ephemeral videos that I don't need in future semesters.) For the videos I've already uploaded, though, it looks like a long slog of click, delete, confirm.
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