When I play a ~2GB+ "1080p" movie, I sometimes get a stutter when its playing throughout the movie, eg. scenes where alot is changing on screen for example. Ive pinned it down to where this only happens with 1080p files. The latest beta update did not help.
Many factors go into how well a video plays. For instance, certain codecs do not have hardware decoding in Kodi .
In short, more info is needed.