For some background, I'll explain what MOST people can see and know while flying these things.
If it is just out of the box with no telemetry connection to a laptop or smartphone, and no video downlink with telemetry text overlay, the operator has no idea how high they are or what they're really looking at. They're putting it up and hoping the GoPro catches some nice shots. This is probably most people.
If it has a telemetry link to a laptop or smartphone, the operator can see all kinds of data. Literally everything. Altitude, speed, heading, waypoints, battery status, etc. You can even have an AI with flight data overlayed like on a PFD. I have this. Usually either my laptop is on a picnic bench, or it's to my smartphone, and talking to my through my bluetooth earpiece.
If you have a video transmitter, the video the camera sees can be transmitted to a monitor or goggles on the ground. So the operator can see what the aircraft sees. I have this. I use a monitor attached to my remote control.
You an also get an OSD to overlay the telemetry data onto the transmitted video. I can see all the telemetry data (altitude, speed, battery, etc) overlayed on it. Very cool stuff. I have this too.
The camera on board the aircraft is doing the recording. That is NOT recording any of the telemetry data. The video recording is not going to show any of the altitude or heading data. It is recording just like it would if you were wearing the camera on your head or attached to the cockpit of your plane for fun. So watching the video will not tell you what his altitude was.
If we can get some nice weather this weekend or weekend, I'll take some pictures and video of mine, what I can see see, and do, and how responsible users avoid interfering with real aircraft.