How do I loop webm or h.264 videos seamlessly?

I have a video that I want to seamlessly loop. When I test the playback there is a tiny pause when it restarts.

As an example, if I had a video background of a tree and the branches move slightly, I want the video to loop seamlessly so the branches never stop moving.

I'm looking for a solution to this problem as well, there are a lot of variables to take into account such as which browser you're testing on and which video format you're using. The way your video is encoded can also apparently have an effect on how well it loops - eg Chrome can screw up the looping MP4s if the keyframes set aren't evenly divisible within the length of the video. I'm only just getting into video with Construct but I can see the looping being an issue for me as well so will be conducting a bunch of tests.

construct.net/en maybe under Video => Video Actions => Set Looping ?

Yeah, I have it setup that way. There is always a slight pause when the video loops again. I'm testing it with nw.js since that is my target publishing output. I'll keep testing different things.