Try looking at your comment in an Incognito window and sort by new. You'll still see your own comment if you're logged in, but you won't see it otherwise. I just tried this.

My comment with "共匪" on the Tank Man video [1] was deleted within minutes.

[1] https://www.youtube.com/watch?v=YeFzeNAHEhU

Google Translate to/from Chinese is often terrible, especially with short phrases. Try 剿匪 which means busting gangs/bandits (剿 = bust, so this phrase is an action against bandits). However, Google translates it to “bandit”.

Same, I went on some video that has very few views and it is a blanket, Youtube-wide censor.

This is gonna backfire so hard, Streisand effect is coming.

I tried 共匪 and 共.匪, both got deleted.

You must have excellent karma. Mine was deleted after ten seconds. I simply wrote: "Just testing if comments containing 共匪 will be deleted" to a Rick and Morty video.