In french but automatic subtitling in english with youtube available
Some tips for filming yourself with a movie camera (gopro) during your sessions

Great video. Let's add something. For those with-foiler scenes (not the drone), use a camera with built-in GPS and add GPS overlays to your video when you edit. You can see speed, distance, and track right on the screen in real time.

I wrote a review of ways to do this here:

www.seabreeze.com.au/forums/Windsurfing/Review/GPS-Cameras-and-Overlay-Rendering-Software

I do not activate the gps to have more battery life

This is true. Running the GPS takes more battery. Same for GPS watches. In any case, Tintingwen makes excellent videos.

Since I use only one camera mounted on helmet or back of boom, I never make videos longer than about 20 minutes raw (4 minutes edited), I have plenty of battery for GPS. Being able to see speed, max speed, track, and distance right on the screen in the final edit is definitely worth battery use.

If I want to record GPS for an entire session, I use a GPS watch, not the camera.