And you'll find..eventually...that if you have a nice sunny day with few or no clouds or deep shadows that you can shoot normal with no problem and it will be all good....but, as has been mentioned, if you have bright clouds or snow or deep...
No, you'd have video playing at half speed.
But if you do nothing and work on/export a 4K30 timeline your video editor will drop half the frames on its own.
All that's left is a faster shutter speed but unless your subject is very specific such...