I don’t know that you need to filter anything. I think the solution is to move away from centralised platforms into self hosted decentralised channels where the owner of the channel controls their own content.

Naively I see three obstacles.

1) cost + technical complexity, but that could be overcome through time, kind of like you have many platforms today that give you a way to create your own blog in a few clicks, and the cost of storage and bandwidth will only go down.

2) revenues. You kind of need an advertising platform (and then we are back to the google monopoly) or a payment platform (visa/mastercard/paypal oligopoly)

3) marketing, which I think is probably the easiest part. You lose the organic traffic of the next video suggested, but it is easy to do cross website subscriptions (rss style), and if people can share your videos through social networks or messaging, you can still have some powerful ways to pass the word (plus advertising).

2) is the one I am the most pessimistic about.