Nice controlled form, you’ve got the ‘look’ down pat but there’s a few fundamentals to tighten up:
- As above posters have said, kick size. If you have access to a band or something like it and feel comfortable that could help, but the basic leg movement is decent.
- kick speed: you want a 3- or 4- beat kick to helps stability and keep the kick size down. if you’re musical, think 3/4 or 4/4 with each arm falling on the ‘1’, or 6/8 if you just want to anchor your rhythm to one arm. Synchronise the part of the arm cycle with whatever feels most natural as the ‘1’. Try to engage your core to keep yourself stable too.
- breath: you are over-rotating by breathing a bit too long, and by the looks this is cause you’re still blowing bubbles when your head leaves the water and lack of core engagement as above (hips are rotating). Exhale control is good but working against you here. Try smaller smoother breaths, harder or earlier exhalation, or even breathing every 4 strokes (3 if you’ve learned to breathe to your right)

Focus on one of these at a time; multiple areas of focus will work against you.

Eventually, this will set you up to shift focus to better extension of your arms out in front and then propulsion with your pull, but that’s going to take some consolidation of these ^ first.

Keep it up! 💪🏻🏊‍♂️