But Google does a lot of trafic shaping as well: If you Wget a video, you see the first bytes stream in really quickly, after which the speed goes down. No need

But Google does a lot of trafic shaping as well: If you Wget a video, you see the first bytes stream in really quickly, after which the speed goes down. No need for your ISP to do this as well. I assume Google tweaks it so your buffer doesn't get empty, but also not too full: if you decide the close the video, the buffer is wasted (which, on Youtube's scale, is a LOT of data).