The PSVita is not region locked, a US PSVita can play an EU PSVita game as would be bought in the UK.
Yes, the PSVita has physical games, small cartridges called PSVita Game Cards. The PSVita has a slot at the top for them.
No, at this moment in time, is it not available for PSVita.
Yes, the PSVita's screen is HD.
No way - psvita is the best, in my opinion.
Yes, the PSVita was released on the 17th of December, 2011.
Sony hasn't stopped making the PSVita.
Yes, the Youtube app for PSVita is free.
The SSID is not something to do with the PSVita itself, it is the 'name' of your wireless network. So when the PSVita wants an SSID, tell it to do an automatic scan, and select your from the list.
The PSVita does not use UMDs, your games either come on the new PSVita Game Cards, or are downloaded from the PSN.
I would suppose so, because the fact that you can download psvita content. Other than that I'm not sure of.
PSVita is way better than that rubbish thing called 3DS