YouTube is now flagging accounts on Premium family plans that aren't in the same household
(www.androidpolice.com)
If unsure of a video, 1. on desktop open in new tab - if ya don't want that content/creator click the 3 dots on the main page video and select don't suggest channel, on phone (just did this a few mins ago) back out of video and since on mobile the home feed doesn't reset hit the 3 dots etc