TV supports USB

I think I just found what I was looking for.
Newer models of Samsung now support Medi@2
Here is the link for anyone else who is interested.

As well as the link for the models that support Medi@2

Not surprisingly these are the newer (more costly models) but personally I would still go into the shop with an avi film on my USB and ask them to play it before purchasing. Just to be sure.