I had a problem with a video to play it on the VLC, and it froze when there was rapid movements. I install "ubuntu-restricted-extras" and that solved part of the problem (now the video goes a little better), but still continues a little freezing. I tried the same video in Ubuntu 15.10 and not froze, so the problem is located in the installation of eOS Loki (I have an ASUS laptop with multiple partitions). I suspect the reason is that in Ubuntu 16.04 LTS (where Loki is based) are no longer available X.Org drivers. Any suggestions? Thanks.