The only reason I care about HIEF is some of our customers using an iPhone send a picture from their phone. Apple just changed the default photo to HIEF and unless the phone user changes it back to JPG we can't open the file. 99.99% of our clients are smart enough to send the data to us in a DWG, LAS, or a shape file, and that works great. The few idiots that send a screen capture of their phones are the very minor issue.
We work will lots of file formats only used in maps, like Mr. Sid and JPG2000, and HEIF is just not a player in our business. It just pops up on occasion like a pimple on my nose, just another annoyance.
The only videos we ever make are from our 3D point clouds of an area. We can rotate the view to any angle and do a "fly through" of the area. It is mostly for showing what can be done and MP4 format works fine for that.
We do work with rather large images.
This is not the largest area we have done, they get a lot bigger.