If you have never used the program before watching a few tutorials on youtube will help.
One thing about Dashware it does not like 4K or higher. I always downsize my videos to 1080. This makes rendering times faster and since it is just getting uploaded to youtube who really cares about high resolution as it gets lost on youtube anyways.
The other thing is to under stand how gauges work. They need info from the telemetry file to show a reading. Using the CSV file from Airdata works perfectly for the
Air 2S and I would think pretty much any of the other mavics.
Dashware will also load the GPX file but I have found some data to be missing from the GPX file.
Once you get things figured out you can save your gauges as a template for later use by just replacing the new telemetry and video file down the road.
There is a learning curve but if you use Youtube to help figure things out is all comes together pretty fast.
Good luck.