I use wonder share to convert the movies I own to mp4 3D and they have a setting for the 3D evo if you update it.
I moved Green Hornet and all my old stuff to a folder and on my desktop then I moved that to my new 32gig card on my phone and it works the same as befor so you did not lose the movie.
Youtube search yt3d or true 3d for some cool stuff. I use FREEdi to download youtube videos. There is jet or others you can use. The phone has to search the sd card again once you download them but other then that it works perfect
The market is very limited on what movies you can buy but any SBS 3D videos will work on our phone you just have to select view in 3D once it starts to play, some need wonder share to be sized for the 3d evo sceen size and this is very easy to do. You can use Handbreak if you want a free program to size it for the evo 3d.
SBS is side by side.. Do not download videos that are for the glasses that are red and blue.
One more thing when adding movies try to keep them under 2 gigs to make them run right on the phone.
Good luck and with a little searching you can load your phone up.