Maybe so, but won't there be less incentive for someone new to post some obscure repair video later on, to help the few people who might benefit from it and make a few dollars?
Sure, there'll be somewhat less incentive, but it's reasonable to assume that it'll still be enough to get a sufficient amount of obscure repair videos. If there was never much of a financial incentive, then pretty much all such videos were produced for other reasons and will still get produced even without that financial incentive.
Good luck getting subscribers though.
sadly we'll probably just see mini networks where people will buy obscure repair videos in the same way they buy ebooks to sell as part of a brand, for virtually nothing, and then monetize though other people's content, huffpo style.