The hyper-wide angle is indeed the limitation with most video cameras. Apart from a few minor technical issues, I believe there's actually a very valid reason for this - hyper-wide video just looks bloody awful unless you really know what you're doing and want to use the effect deliberately
It seems to me that the GoPro has popularized hype-wide (actually fisheye) video. It's purpose in life (which it fulfills very well) is to "get as much of the action in the shot as possible whilst surviving the water/snow/sand/impact/etc. and/or operating in a very confined space" - so if that's your criteria then the GoPro is a great choice. On the other hand, if the goal is to produce
good looking video then you certainly want a lens with a much more natural perspective and good rectilinear performance (the ability to render straight lines as straight). Even the wide end of a camcorder (sometimes as wide as 24mm or 28mm "35mm equivalent") is too wide for many scenes, exhibiting nauseating convergence of vertical lines.
In so far as aerial videography is a rather special, niche usage it might be argued that hyper-wide is needed to "get as much of the landscape in as possible". But such an aim indicates (to me) that the video's purpose is purely "record keeping": in which case, just use a GoPro. For aesthetically-pleasing video, even from the air, a more moderate perspective yields much better results. Don't forget that with an MR you have the "ultimate zoom lens" - if you want to "get more in" you just fly higher
Many Sony, Panasonic, etc. models offer all that you'd need, often for less cost and less weight than a DSLR, as long as you concede on the wide-angle part