If you’re not as lucky as us (our school district has unblocked YouTube for teacher accounts), I thought having a list like this would be useful.
You might also be interested in The Best Sites For News & History Videos That Won’t Get Blocked By Content Filters (At Least, Not By Ours!).
I hope readers will contribute more suggestions.
Here are my choices for The Best Places On The Web To Find Documentaries (Non-YouTube):
I’ll start off with suggesting you see a post by Richard Byrne, where he recommends five places to see online documentaries for free.
As always, feedback is welcome.