Sounds like still photo work, might be best to ask on the mu-43 forum. That said, I would probably go with a wireless flash controller like the Yongnuo and two of their wireless flashes. Not sure what to suggest about remote trigger, but they probably have a solution for that as well.
I can't find a decent link to their products, but I know they have some decent wireless flash systems.
Just in case anyone else needs this info as... the remote shutter will work with video as well...
Altura on amazon has a package of a remote button and 2 receivers that both can do remote shutter or remote flash. If you shoot video with 2 GH's, you can start them at the same time. I bought two kits and all 4 receivers will work with one remote. Cool stuff.
Thanks, I was wondering if any of these could trigger video. I assume you just plug in the 2.5mm cord and it trips the shutter when you fire the remote.