That’s not full on fighting, but I’d call it more like sparring, or feeling each other out. In the video the interactions are definitely aggressive, but not full on fighting.
That said, rabbit play can also involve jumping up and running around. The main things to look at are ear and tail position. Ears back, tail up = aggressive. Ears facing forward and tail down = playful. My bonded pair will binky and run all around the room, but it’s more side by side.
Circling (as is seen in the video) is aggressive and can lead to fighting, so it should be stopped. You can do this by petting them both to calm them down. You can also try a loud noise (like a vacuum cleaner, or even clapping and saying HEY!).
Sounds like Coconut has partially submitted to Logan, but maybe isn’t quite there all the way yet, or at least Logan isn’t sure he trusts her yet.
For now don’t stress too much about him grooming her back, but work on keeping them calm when they approach to build trust. So when Logan approaches, pet Coconut. When they go nose to nose, pet them both and swap scents. Sometimes this is enough to trigger grooming.
A short chase of a few seconds is OK, but if it turns into fast chasing or circling, stop them.
.
.
.
The answers provided in this discussion are for general guideline purposes only. The information is not intended to diagnose or treat your pet. Seek the advice of your veterinarian or a qualified behaviorist.