I started with the two suggested by @Mi_Amigo
Astronomy on youtube

Thanks. I need some videos to watch. I have watched some of Brian Cox videos on YouTube which I find quite interesting and he explains things well for us people who don’t have an intense science background.

Astrogeekz, their videos aren't nice enough since they aren't known much and lack sponsership, but some of their videos are insightful

Just such a gorgeous sequence of photos, I had to post it somewhere, and this seemed a reasonable place. Taken from about a 900,000 miles from Earth by NASA's EPIC 10-channel colour CCD telescope, on NOAA’s Deep Space Climate Observatory.
If you find an astronomy youtube channel that other members might find interesting just post it here and I will add it to the list.
Interesting youtube Channels