[davidmanze]

A nice panasonic GH5 should do - but I have no idea about the qualities of it's WiFi tether controls. So, I fully support dave's reply 

 

Some of the better drones already have a very capable 4K video camera on a Gimbal - I don't believe a current DSLR would improve a lot compared to DJI Mavic Pro

  

  If you are happy with the level of drone 4K cameras but don't want to raise the brides dress around her ears to reveal her "modesty" at the alter!... :o    ....

   .........  then there are inexpensive mini 4K cameras sold separately, but with wide general angle fixed lenses, I don't see a role for them in wedding photography though..

 

https://www.youtube.com/watch?v=5G9N1D-gBH4&t=97s

 

 

 

 

    For a real proven video camera the GH4 remains the cheapest!