Thank you for the info in both posts.
I'm totally fine with not being able to use the Panasonic batteries in the Pentax. I did notice that the Panasonic battery wouldn't seat. I have a good amount of Pentax batteries, so it works out.
Video is a new realm for me, so I have alot to learn as far as getting a setup together and actually shooting the video. I've got experience with Sony Vegas Pro 9 editing wedding videos a few years back, just never shot video myself.
I got the GH5 kit with the Panasonic 8-18mm lens. I want have a vlogging setup for commentary or whatever, as well as shooting wildlife. If it's anything like my Pentax equipment, i'll have a setup for shooting everything in the end.