I have watch later video lists on more than one platform, on youtube, my down time list has bifurcated into two lists. One that is public and one that is private, the private one is religious stuff and political debates and the public one is Mysteries, History and things that are interesting to me at that time that I have no problem with other people seeing.
So My two Down time play lists on YouTube are...
Watch later : Private
And
Down Time : Public.
They both change very often. When you Chromecast to your TV, you can add whole playlists to the Queue so that is quite useful. It is also amazing to me that my Chromecast is so small yet it is spitting out high quality Video and is powered by the TV, I was a kid in the 90s so I can appreciate how amazing that is. Kids these days won't understand why that is so Amazing. A device the size of a man's thumb has powerful graphics output that would match the best 90s computer. Yet is is powered by a 12v TV USB socket.
Perhaps I am amazed too easily.