On December 23, 2019, Googles YouTube.com began removing bitcoin and other cryptocurrencies related content from the video-sharing platform in whats being called a crypto-purge, leaving content creators in the bitcoin and cryptocurrency vertical unjustly attacked by the web-search conglomerate. According to Forbes, at least 35 crypto-focused YouTube channels were affected by the purge, including ChrisDunnTV, Nugget News, Crypto Tips, and BTC Sessions. More prominent publishers such as CoinTelegraph and CNBC, appear to have been spared. I have found this info here
https://techandmedialaw.com/youtube-content-creators-in-bitcoin-genre-red-flagged-was-it-an-error/ but I need more clarification, what actually happened by Youtube?.
It seems like YouTube has updated its rules and algorithms over time. So it caused cryptocurrency videos to be deleted, but everything was quickly fixed and the videos were restored. So far I haven't seen any videos deleted, I guess everything will be normal and nothing will happen in the future so you don't need to worry. If youtube wanted to block all things related to the cryptocurrency market, they would have started doing it a long time ago, but fortunately that's not their intention.