Hopefully by now he's realized it's serving even more people than he was originally aiming for, and keeps it up for us.
On the 3DS, the actual YouTube app is launched to exploit the system; there's a lot more to it. We are only using the DNS that blocks Nintendo's servers. It redirects traffic from YouTube to that server, thus still keeping us from using YouTube. (TBH I don't really know if it actually does block YouTube since I dont allow internet access to my Wii U).
Theoretically, if we knew exactly which URLs TubeHax DNS blocks (I've never met somebody that does in passing, though I haven't tried hard to find out), somebody could set up a DNS server and block those for us so we could keep YouTube access. I believe nallar's DNS (GBATemp user) would achieve this.
The problem with that is that smea is very reputable and probably has some sort of backup operation in place. If some random user sets one up, how many would trust them to not pull the plug (or be paid by Nintendo to pull it
) to update everyone? Also what if a power outage occured for that person?
What is currently in place is as good as it gets until smea is wanting to be done with it.