Me too. I organize them by length. I have a folder for under 30 minutes, 30 minutes to an hour, and over an hour. Lots of good stuff in there that I always plan to get to, but generally I add new ones faster than I watch old ones.
I am rarely in a mood to watch YouTube videos longer than 5-10 minutes for some reason. Shorter ones I often watch right away, but all the others get filed away for a rainy day.