I've always thought an auction type business model would work for online media. A content creator puts his work up for sale at a certain price to one or many people willing to buy it. Once those individuals purchase it at that price they turn around and resell it at a lower price to more people. As the reselling continues the price drops very quickly, and everyone up the chain buying/reselling makes a small profit. The last people to buy the video would end up paying a very low price. You might also have to implement some kind of proof-of-bandwidth protocol since some people might be willing to pay for a faster download.
Agree with the convenience factor. It would have to be ridiculously easy to get bitcoins and spend them on various projects for this to work. The difference between a regular pay wall and Vitalik's model is that the pay wall is crowdfunded. Having said thay, it's still not ideal, which is why the voting method or something else could give audiences the proper incentives.