wow , well I am glad i did not put any lgbt stuff in my favorites yet, i made a seperate folder/playlist called genderfluid (which you can make private) and within the playlist you can make each video private or unlisted (unlisted is the same, just lets more people view it you share it with)
But ya know I had outed myself to my mom by accident cause I was playing around with my voicemail on my cell phone trying to use a more feminine voice, and my mom called like 5 minutes after i had changed it and was listening to it on my phone.
It was dumb of me cause I wasant ready.
So it does really suck but, you probably didnt know you could make a playlist private. You can't make the favorites private , but you can make a new playlist and make that "private"