Please, please, please watch this video and don't be defrauded by any Cardano (cryptocurrency) Giveaway because they simply are scams.
The YouTube channels are hacked impersonating famous people in the cryptocurrency world. The data behind of those sites are hardcoded code that emulates transactions. Everything is fake on those type of sites.
THERE IS NO GIVEAWAY IN CRYPTO CURRENCY!
I hope this post saved some people to loose their crypto coins. Be vigilant.