Submission statement: starting in October of last year, YouTube conducted what has been called a "massive purge" of channels. The BitBurned directory is an index of such (former) channels, with links to where they can be found on "alt-tech" (in contrast to Big Tech) services, including: Bitchute, Parler, Gab, and Rumble.

Recent relevant articles of interest, showing this is an important topic:

https://news.ycombinator.com/item?id=27874527 Right or left, you should be worried about big tech censorship - eff.org - 2021-07-18 (309 comments)

https://news.ycombinator.com/item?id=27858032 Google Drive bans distribution of “misleading content” - support.google.com - 2021-07-16 (1531 comments)

https://news.ycombinator.com/item?id=27646686 YouTube takes down Xinjiang videos, forcing rights group to seek alternative - Reuters - 2021-06-26 (261 comments)

https://news.ycombinator.com/item?id=26215122 Online Speech Is Now an Existential Question for Tech - WSJ - 2021-02-21 (40 comments)

https://news.ycombinator.com/item?id=26045088 The war on disinformation is a war on dissent - humanevents.com - 2021-02-06 (437 comments)

https://news.ycombinator.com/item?id=25359003 YouTube to remove content that alleges widespread election fraud - blog.youtube - 2020-12-09 (3227 comments)

https://news.ycombinator.com/item?id=25097145 Conservatives flock to Parler, claiming censorship on Facebook and Twitter - npr.org - 2020-11-15 (876 comments)