Just wanna share this. When I play a video file in any player (SMPlayer, mpv, VLC) the video always show some tearing, either full screen or not. Although the tearing was not so bad, it's quite noticeable and I was wondering whether it can still be lessened or removed. Most suggestions I read say to adjust v-sync, which I thought was not available.
V-sync is in system settings>display>compositor. It's set at automatic as default. I experimented with "only when cheap" and "full screen repaint" and I got better video replay with either of the latter: very minor and rare instance of video tearing. You get a warning about performance being affected, but so far I have yet to notice any "bad" performance effect after changing the v-sync setting.