Looks like these are hacked youtube accounts. The group behind these hacks is using this tactic, hacking the account, changing the names to something like Ripple, or Tesla and they promote a fake giveaway.
These giveaway scammers are still using this technique to scam. Earlier, they also hacked popular YouTube channels and uploaded such giveaway videos. So that a huge amount of people can be scammed. The more subscribers you see, the more people will trust them and they will be able to scam more people. Since the subscriber to this channel is 200k+ so it looks like it is a hacked channel. This is a fake channel they change this channel's original name. Warn everyone, you have done a good job OP.
I have noticed this scam channel right after google recomending me the video to watch, I don't believe when I saw it, big channel and thousands of views, I've already reported it, Youtube delete some legit channels related to Crypto and a clearly Scam is still available there,sad.