As promissed (later than expected though, sorry), here is the video:
Note that right now the gimbal can only be effectively moved up or down due to the default gimbal follows chassis mode (i.e. the left/right movement of thee gimbal is tied to the chassis movement). I am looking on how to set the default mode to chassis follow gimbal (this, for some reason is actually more difficult than expected).
Hello and good day BGA. Thank you for sharing this information and for creating this video for the DJI Robomaster S1. Great work and thank you for your support.