What is your method for downloading? Does you tablet have a USB or SD card slot?
Yes, but does it have a USB or SD card slot????
Pity. I had a simple work-around for you if that was the case. I will let others who use Wi-Fi work on this for you.
As John_Q said, the Canon T7 uses the MOV file format for its videos.There probability are compatibility issues with your Samsung Android Tablet. You will probably need to convert that MOV file to an MP4 file first. Here's a source for reading up on that:
I do not know if there are video file converter apps on the Google Play Store, or Samsung's Galaxy store. You'll have to look. You may have to use a computer first. I just don't know.
If you want to start using a USB cable to connect your tablet to your camera, you'll need an OTG (on the go) cable to connect your Android device to the USB cable, and an IFC-600PCU interface cable to connect the USB cable to the USB port on your camera. The OTG cable plugs into the charging port on your tablet.
I got the OTG cable off Amazon, and the IFC-600PCU cable from Canon.