Like I said, my Vita don't detect my mp4 videos that i have on my computer, Yes i'm using content manager the right way 'cause it detect the music files and pictures but not the videos files, before the update everything was just fine. also it does not detect video files from the PS3, only the movies that I have bought from PS Network. Does anyone knows what really happened or is just my Vita that has a failure?
I doubt that it has anything to do with the Vita. Did you try rebuilding the Content Manager Assistant database on the Other tab of the Content Manager Assistant settings?