Abe Felix

Kdenlive is a solid free video editing program! We started by using openshot (also free) but had problems similar to what you're describing. Another handy one is OBS (free, lets you record what happens on your screen into a video, which always seem to come up in one way or another).

I hope those can help!

As you can see in the above video, the samples were incredibly small, and yet achieving an output greater than 1 volt.  

Reminds me of telluric current! Telluric current is generally under a volt and that at one point remotely powered networks of telegraph repeaters.

https://www.instructables.com/DIY-1kW-MPPT-Solar-Charge-Controller/

Here's a cool (and difficult)  project that could turn that into friendlier voltages for use. The designer did a great job explaining the tech that converts these low and variable power sources into something like a nice smooth 12v

Safe tinkering!