I have been looking at buying FTX Global but looking at video on youtube, the beaches look like they disappear. Has anybody installed it and does anybody have some screenshots of the beaches.

I think if you have UTX, in those areas you will get their beaches showing up. Don't know about the non-UTX areas.

I think it wouldn't matter.  If you have beaches now, you will have beaches after.  They just may be textured differently.  FTXG is just textures.  Nothing else(with the exception of China and I forget the other sample area that had their land class).