I know you have limited intellectual abilities, but as you are claiming that there is such obvious evidence of corruption (after you carefully watched those entertaining videos), it should be easy for you to reply! Why are you unable to phrase it? 🤣
The basic pattern of corruption is that an official receives money from someone or some organisation in order to get some favour in exchange, such as a public procurement contract, a licence, a concession, etc... Tit for tat!
So who gave what to Joe Biden, and in exchange for what?