Your talk of providing estimates just reminds me of this scene from Star Trek TNG.
Geordi La Forge: I told the Captain I'd have this analysis done in an hour.
Scotty: How long will it really take?
Geordi La Forge: An hour!
Scotty: Oh, you didn't tell him how long it would 'really' take, did ya?
Geordi La Forge: Well, of course I did.
Scotty: Oh, laddie. You've got a lot to learn if you want people to think of you as a miracle worker.
I'm expecting someone smart at Google to figure out how to encode ads as part of the video file as it is delivered, making it literally undifferentiatable in the data we receive, and then there's no way around it. They'll make millions in ads and billions licensing it out.