I'm using a Roku Express that's about a year old. Up until a month or two ago, I never had any problems but since that time, I have to reactivate/log in to Youtube every other day, sometimes daily. Before this started happening, I was logged in for months at a time without issue.
Anything I can try?
Interestingly, my Roku was not in the device list. I did delete and reinstall YouTube a couple of days ago with no change in behavior.