You'll find videos here that cover the Manitoba (Canada) Grade 11 and Grade 12 Pre-Calculus Mathematics Curriculum. You'll also find "10 Minute Math Reviews", which cover a variety (and ever expanding, send me suggestions) of math concepts in a quick 10 minute format.
I am also slowly creating a programming playlist, using Microsoft Visual Basic.
I also occasionally upload podcasts/interviews with various educators to get a sense of what other educators are doing out there.