The guys who made the video have been close to Mayweather and his team for ages now. Floyd has given them a bunch of exclusive stuff for years now, whether it be lengthy interviews, mansion tours, etc., etc. They also claimed that "FightHype.com recently obtained a copy of the proposal that was sent to Floyd Mayweather regarding a December 31 bout with Tenshin Nasukawa at Rizin 14.", which they may have indeed obtained since they would have their connections with the Mayweather team. But that site/channel is also extremely pro-Mayweather with their content, so there's also a very real chance that this is another situation where they're trying to present Floyd in the best light possible and not divulging anything in the documents (if they indeed obtained them) that would make him look bad in this situation. They have a long history of being a apologist, promoter, and protector of Floyd's, and as such, you're right to say that they are not a legit and objective media source regarding this situation.