Hey wkarotten,
Have you tried checking to see if there were satellites/debris passing the stars in your videos at the time you filmed these videos? Maybe look on heavensabove or similar sites
There is so much stuff up there now, the flashes of light you have recorded appear to be tumbling and or flaring satellites, if you identify what stars they are appearing by and the time you should be able to find what the objects are.
You never know what you'll see in the night sky so well worth recording things and taking pictures, and being ready to, i had 2 cameras within arms reach but i still didn't get any footage or pictures of the "super fast satellite" i saw that this thread is concerned with