i need to waste time tonight.

Veritasium
Smarter Every Day
Sixty Symbols
Periodic Videos
Numberphile
Minute Physics
Sci Show

I mean go to Vsauce's channel and look at the related channels over to the right and you'll find a number of other's including those above.

Minute Science or whatever, love their videos.

If you're into theoretical physics perimeter in waterloo has a channel where they post plenty of talks.

There's also the philosophy of cosmology channel, a good bit of multiverse talk on there but at least they call it what it is, philosophy.

Mars Underground
Applied Science
Cars and Water

Minutephysics
Carsandwater
Science Friction
TAOFLEDERMAUS
AWE me
SmarterEveryDay
SciShow and SciShow Space
Scott Manley