I'm currently downloading a show that is on a service to which I subscribe
I have a Galaxy Tab S7 and for a trip to Spain I downloaded some stuff to watch on the flight. When I got on the plane none of the stuff downloaded on Disney+ would play. Maybe an issue with downloading to the SD card? I don't know, but regardless Disney offers SD card as a download destination so they should make sure it is working.
So now I'm here pirating a show that should be available to me through a service I pay for. Gabe was right, piracy is a service problem.
If you connected to the plane's Wi-Fi disney+ tries to validate before opening downloads or something like that, but the wifi usually blocks streaming requests
You need to put the phone in airplane mode, open disney+, then you can connect the Wi-Fi