Francois, you very well assembled both video and sound in the clips.
It is perceived easily and pleasantly.
As a teaser of something more detailed and interesting.
I do not like to follow trends and rules. They quickly lose relevance or become bored when the majority follows only them.
Try to alternate the rapidly changing strokes of b-roll with longer main scenes that accentuate attention and give a time to contemplate and enjoy the details
. It is also very important to "pull" the image into a stronger dynamic with the correct parameters of the primary survey and subsequent grading (note the screenshots; these moments can easily be corrected in the LF).
Use Filmic Pro. This application will definitely improve your video. The main thing is to keep the minimum possible ISO
. 200 is the limit for weak light
But it's still better to perform the grading on the computer (this is a process that requires power that are not yet available for tablets), although the base one can be done in LF v1.4 or with VideoGrade
Much should become easier and more convenient in the next version of LF.
And, as usual, people say in such cases, keep up the good work and fun!