Videos produced with Davinci Resolve (Cineform) and encoded to H.264 MP4 with Handbrake don't work properly with some video player (i.e. Media Player Classic). The issue occurs when seeking / skipping using timeline. Instead of jumping to the place clicked on the timeline, it starts playing several seconds earlier or later.
The issue was resolved by adding keyint=60 to Handbrake Advanced Video Options. This forces a keyframe every 60 frames (every second for 60fps video). If your video framerate is not 60fps, adjust the value accordingly. You can choose to put every 2 seconds, this will result in a slightly smaller file size.