It will change when the Charlie Chaplin of youtube arrives. Chaplin made a lot of movies, he eventually started Universal studios with the thought that the creators of the films should get the beneficiary. Two things matter in H'wood, owning the distribution channels and skill at hype. A youtube 'show' gets a certain amount of word of mouth hype but that 'youtube-house' has not seen a true impresario. One thing the impresario/producers need is the lure of the big payoff, that exists for VC's but not for producers. What will trigger massive change in the studio structure is when an investment in a youtube production can trigger a huge payoff to the frontman. Then he can dangle the costs of producing a single show in front of the gamblers. Right now the only big winner for a youtube 'show' is google and they will not front production costs.
Shows (movies, TV, Broadway, youtube) are structured very different than a business. They are big for a month, a day, or a few years, then on to the next big thing. Few want version 2.0 of say 'Rainman' (with rare exceptions). But even exceptions are really 'new companies' as opposed to an ongoing offering. There seems to be overlap with the spike of new ventures, but when the venture is sold, all the principals don't leave and go to the next show. After the wrap party, everyone is looking for work. There are support companies with continuation (prop rental, render farms) but the core business is show business.