Yes this is normal for yuneec, but not normal for cameras.Nope. All cameras split video to avoid large file sizes. You have to put them together in an editor.
That is probably true.For what it's worth, GoPros do this as well.
I've learned to pre-edit by thinking in 5 min shots. One benefit is that if you don't stop recording and shut off the H, the last file will be corrupt. They butt together seamlessly in post.That is probably true.
I have not used a gopro much.
I would think that it would be for the same reason. It seems to be inherent in action cams. I can see them using this feature to protect against the loss of footage during any camera trauma.
Probably overall a good idea, but is annoying.