It's such garbage content and I also stopped watching. I figure he probably can expense a lot of the cost/tax because it's a business purchase once he makes content out of it but not sure if that works the way I think it does..
People write off personal stuff as a business expense all the time, it's not like tax authorities have the time to go through line items on invoices.
As for the legality, when you take stuff that you bought for the company and later use it for personal things, you need to "pay" the company for it, you can't just write if off.
