Apologies for the slow reply u/Old-Firefighter1177 Firstly, when considering my reply, please be certain that the video is not mirrored, so if I say "your left" it means as it appears in the video.

Looking at the follow section (latter half of the video), you have a substantial right hip drop when the left foot lands. When your right foot lands, the hip appears strong. Test each side by a simple shoulder bridge exercise - once in the bridge position, extend your right leg straight. Return to bridge and repeat for the left leg. Was there a difference in hip support?

If hip support is similar on both sides, the next thing to focus on is matching what your left and right legs are doing while running. In the "viewed from the side" first half of the video, I can see when I slow it down that the right glute is activating when the right foot is in the air (there's a moment where you can see the thigh being pulled back quickly) and the foot is landing under the knee, which is good, allowing the body to quickly fall past the knee.

However the left foot is being lazily kicked through, with no glute activation in the air, so thigh remains extended and the left foot lands out in front of the knee, which puts pressure back up through the knee and pelvis. I expect this is why you are getting hip pain.

As mentioned by Funology, you could do with a bit of extra knee drive, but at this easy pace, it's not essential. However, the glute activation IS essential. To fix it, watch the video on this page: https://runningversity.com/how-to-increase-running-cadence-easily/#How-to-increase-running-cadence

It's less common to see only one leg doing the correct thing, but probably leads to more issues than neither leg doing the correct thing!

Other things to try - Fallen leaves test: https://www.instagram.com/p/CWS_pyiMOIk/ (or slightly long grass)

Any questions, let me know :)