Yeah, only twice have I had to submit a fair use dispute, and both times were for short documentary content of less than 60 seconds in a 3 or 4 hour stream. The thing that sucks is the vod will be hidden for 48 hours. There is a more serious "appeal" option you can use instead of "dispute" which makes your video visible immediately, but if you are overruled on the appeal then you get a copyright strike on your channel. The "dispute" option takes longer but has no negative consequences if you're overruled.