Hello from New Zealand I started with a 2nd hand Spark and now have the Mini 2
Fantastic Drone
No drop outs - quiet - fast - long range and great battery life

When I copied my 4K video clips from the drones Micro SD - along the bottom is all the info ie: GPS - height - speeds etc
Where is the function to stop this been left on the Video file

I notice on my Smartphone - the Cach version does not have it
Is this file available to be downloaded and used too ??

My computer is not strong enough to run or edit the 4K video from the mini 2
So it will possibly be 2.7 in future until I upgrade putor :-(

It sounds like you have very likely turned on subtitles in the settings on your drone.  You can turn this setting off in the camera settings for future videos.  

For your existing videos, depending upon which video playback software you are using, it will likely be different on how you turn off the setting that displays these subtitles.

"My computer is not strong enough to run or edit the 4K video from the mini 2
So it will possibly be 2.7 in future until I upgrade putor :-("

I hear you. I am the same. I can watch 4k on the pc but not on YouTube. Wife has my new pc order for Christmas. It's her own fault for buying me my first drone (Mini) a year ago, so it's all on her ;-)

Hello there NZMini2. Thank you for reaching out and for these information you have posted. If you have the subtitles enabled in the DJI Fly application, the video will also include telemetry data when filming. On the DJI Fly application, you may click on the three dots on the top right hand corner of the screen to bring up the settings menu, then camera, advanced shooting settings, scroll down to video subtitles and disable. Thank you.