Even if it doesn't affect people outside the US, Americans would probably be hit by a wave of "You're not allowed to view this video in your country" messages we Germans already have because of the stupid GEMA.
Not just for Gaming videos, but also for music videos, songs, TV shows (or excerpts of them) etc, as according to that explanation, these are the primary reason for that bill.
So if you're American, do yourself a favor and oppose that bill however possible.