When i upload a movie (avi format) to my surface and played it, it showed noticeable lag in the video playback, but not in the sound. Does anyone know how to solve this? I looked it if my cpu was maxing out, and it was hardly straining.
I have Girlfriend Experience in AVI format in my external hard drive. I am playing it in snapped view, full view, and filled view and I can't replicate your issue. I do have the latest Patch Tuesday updates.
BTW, have you tried watching the movie using Picture Viewer, and not xbox video? It works perfectly fine for me also.
There is something up with the Microsoft Video viewer. Recently a couple of AVIs stopped playing while the audio kept going, same video at different locations. Same videos play without issue in 3rd party apps.