CAMERAS 

This is the first camera I would buy, because it has good IBIS (In-Body Image Stabilization) a decent sensor, weather sealing, a flip-around screen (for vlogging) and a mic input. The screen is pretty accurate (almost as good as the GX85) which I think is important when you're learning filmmaking (it helps you make focus and exposure judgements without the need for an additional monitor).

This camera is a great deal, and is my preferred #2 camera (the G85 being the primary, as this one doesn't have a microphone jack). The image from this camera matches the Panasonic G85 perfectly, and so the settings I use are almost always the same (this makes sense to me, as it uses the same sensor, but slightly different processing). The screen on this camera is one of the most accurate I have ever used (and is good enough to make focus, exposure and even color judgements).This camera is also VERY useful as an architectural camera because it can use a tilt/shift adapter (with a wide angle) whereas the G7, G85, G95 cannot (because the pop-up flash overhangs the lens mount). I think the IBIS (In-Body Image Stabilization) is better than the G85 (which is REALLY good) and this feature alone makes this an excellent pick.

This camera is good for leaving in the studio, but I don't like using it in the field. The lack of IBIS (In-Body Image Stabilization) means you need a larger, heavier tripod (or gimbal) to use it effectively. Also, the inaccurate screen isn't a good tool for beginners who need to make exposure and other image judgements using it (instead of an external monitor). The GX85 and G85 screens are much better (but the GH4 screen is even worse than the G7).

I'm pretty close to being convinced that the FZ1000 is a truly professional filmmaking tool. After 2 years of testing, I figured out how to make this camera produce a "non-digital" looking image by using custom camera settings which you can find on my website. I would buy this camera before you buy an expensive telephoto lens because it is almost the same price. However, it isn't very good in LOW LIGHT, but it's a great OUTDOOR tool. There's more information in my article called Is The FZ1000 Good For (Budget) Filmmaking?.

Putting a GoPro on top of your "real" camera is a really easy way to get a #2 shot. I would say the HERO 4 Silver is the best deal, if you don't need stabilization (which you don't need as much when it's mounted to the top of your camera). The HERO4 Silver is the oldest I would go, and if you need image stabilization, go 7 or newer (I think the 8 is the best overall #2 camera for super low budget filmmaking).