[dragonsky67]

In most cases I find direct ad insertion (as in ad sponsership of the creator) a lot less offensive than some algorythmetic insertion based on some unknown metric. At least then the creator has to decide if the ad they are running is acceptable in their product.

[Yetanfou]

That isn't ad insertion but sponsorship. What I mean is for the server to present a single video stream which does not contain markers to identify advertising content, more or less the way many netcast ads are inserted into the audio stream.