I don't block ads on YouTube but lately it has been getting crazy even on normal videos - ad at the start, get 20-30 seconds in get a double ad feature, then just as the video gets going another ad, then another ad followed by another ad around 10 seconds from the end :s it is making it hard to even watch some videos as it is interrupted so often and this isn't even those channels that upload **** to get ad revenue with a dozen ads in 10 minutes.