Glaucus said:
It's probably not that weird. Politicians tend to love all that social networking stuff so they "friend" everyone.
On youtube people can send you friend request which you can accept or reject. But subscriptions are totally at the discretion of the subscriber. If you have a youtube account and you watch a video you can click subscribe to be notified of any other videos that the user you subscribe to may then later upload. It takes a bit more conscious effort than accepting a "friend" request. Interestingly the Giffords channel does not have any friends. Of the subscriptions, there are only two and one is the shooter. It is actually a lot weird.
It wouldn't be that weird if it turned out that the giffords account had been hacked. These things happen but I don't think that is what is going on here.
Among the weird things about it is that the user of the giffords page claims to be 27 years old - the real Gaby Giffords probably wouldn't have bothered fibbing about that. A hacker might have changed it but it would be a pointless thing to do.
More likely, since the channel user name is giffords2, this is an account that was set up by a "fan". It hasn't yet been officially disowned as far as I know but then again the person who would most likely know if it is genuine is not able to tell us right now.
I don't think that the joined date can be faked. That is something youtube maintains and I don't think it is hackable so it was probably set up when it says it was set up and the video that are on it were probably uploaded when it says they were uploaded.
If it was maintained by a fan then the fan may have added the link tot he shooter just as an important relevant link. It would be strange to do it without adding context. It also appears that the user of that sight is not uploading anything more nor visiting. News reports of the shooting should be a natural addition if it is a fan site.
This raises the interesting possibility in my mind that the fan may not be able to post because the fan is currently under arrest. It may be that Jared created the giffords2 site two years ago and been obsessively uploading videos of her ever since. The video he links to on his own page under favourites looks like a video that is also made by Jared. The video description and the added overlays all have his mental slant to them, so it's not unreasonable to imagine that he had multiple accounts that he cross linked (there are plenty of egotistical youtube users who do this so that they can subscribe to themselves and thumb up their own videos and leave themselves comments).
IF the above speculation has any merit then it could simply be that he was a schizophrenic (or near enough) person who had an obsession with Gabby Giffords and the trigger may have been something that she said on television that he (in a paranoid mental state) took as a personal message or insult. That would make this shooting personal, in a way. Though we cannot dismiss politics as motive because he does rant (incoherently) about politics quite a lot. Maybe it was a final straw and made his target selection easier.
Update:
Someone logged into the account 9 hours ago and the Classitup10 subscription has been removed. Loughner didn't do that, I'd wager.