As you are the Original Poster this can't be a hijack - so, just because something is attainable doesn't mean you can possess it. For instance, it is actually illegal to record shows off the TV due to copyright. How you would hope to understand it and what is the actual law are rarely the same thing.
Google have pursued web sites
offering this service, which doesn't show the law, but it does show Google's perception of it.
A video uploaded to Google by it's owner trusts that its for youtube use alone, unless they directly specify a
download feature. An art museum won't allow you to take photographs of the art in the public gallery.
That Google fight against 3rd party software getting the content they hold, which could also be obtained through
Google Checkout means they don't think it's legal, and it contravenes the end user's
Terms of Service, but because it's the web service compromising the TOS for the benefit of the end user, means they haven't been able to make it stand up in court.