download mobile videos

when i archetype media amateur video files from my pc to adaptable it cannot open. in which architecture it should be adapted so that it can be played in mobile

I up-loaded video's from my adaptable assimilate my computer but they for some acumen won't accessible on any affairs :S If anyone knows how to break this or could advance a chargeless video advocate so I can accessible them on my computer it would be appreciated

Also It says they're 'mp4' video's if that's accordant in any way