A mix of various things. Google to get to the channel:

pbs spacetime

stuff made here

ben eater's 8 bit computer

mike boyd

nerdforge

sabine hossenfelder

gotham chess

uthermal

3blue1brown

veritasium

Numberphile

Suckerpinch (all time favourite: https://youtu.be/LA_DrBwkiJA)

Stevey's tech talk

leonard susskind's stanford lectures

Wristwatch revival

Advoko Makes