A first step towards reducing those externalities [1] is mandating that they power consumption Youtube incurs is accounted for. -- Another Youtube thing that made my computer screams is "theater mode", eating so much CPU for eye candy on so many devices ought to be at least declared.
[1] To explain the externality: Google probably does that because they make maybe +0.5% revenues by click to video, at almost 0 cost for them. Since the whole extra cost is paid for by the user (by requiring a bigger computer, by consuming more electricity). The price for the user to view a page without the embed and with it can be something like +20% at no gain for them. It's so small than no sane user make those computations, but if you start accounting like a company, you would see the difference. (Plus obviously all the ecological externalities)