I watched the youtube video about it and as far as i understand:
Venezuela doesn’t allow people to exchange in it’s currency from other currencies unless you are a person from president family or friends with him
However there is a weird legal way to do so, but it takes a huge amount of time and paperwork and you still can get rejected
There is shady exchangers in the country, but it is illegal and you might get in troubles even trying to do so with the wrong people and I don’t think someone would actually do it online