I'll see if I vote in a minute, but having watched the entire video, I'm not immidiately alarmed. After all, as it explains, this is not intended to stand apposed to the intent of tutorial creators, let's play makers and reviewers and I highly doubt and public prosecutor would try to enforce this law (should this bill become so) upon those groups when there are plenty of juicy movie and music copyright thieves out there walking around as targets.
In fact, copyright theft court cases usually do revolve solely around how much money has been made because of the copyright theft and that means that for most people video game related, we're looking at a 0 dollar profit.
(In other law

This is one of the main reasons that underage smoking and drinking is not illigal, whereas selling tobacco and alcohol to underage people is. A reason that it's unenforceabe is because regulation is simply not possible in a democratic (read: free) society.
That brings me seamlessly back to internet content. Most of you will be aware that even owning child pornography is, in most countries, a criminal offence punishable with prison, as indeed it should be. Nevertheless, I have read statistics saying that there are still about 100.000 child pornography sites out there and there's a simple reason for this. Between billions of sites, these are the felons hiding in the sewers after a mass jail break. You simply cannot get them all and therefore it's still going to exist, because of a lack of regulation.
Now, with matters considerably less harmful to human beings, such as copyright material, I can imagine the enforceability will suffer even more, as these kind of matters lie more on the backburner.
Also, there's an international aspect to understand. This law only directly applies to citizens of the U.S. That means that if you are abroad and disregard this law (again should it become so), then the great lack of infrastructure in international law will prove as too much for the U.S. prosecution to bother with when it concerns, for instance, Yahtzee's animated webcomics. Since after all, that would involve quite a few diplomatic negotiations (although I'm pretty sure in Yahztee's case the Australian government would sell him out in a heartbeat if it would come to that >.>).
So yeah, even if the bill is passed, we don't have a lot to worry about as gamers and as the video explains, the bill is far from done yet. Personally I have no doubt it will be nipped in the bud as quick as lightning strikes.