Questions:

1: How to upload video and picture?

Please use the connect both screen and your computer( both ok), after your computer showed the screen disk, than, please move your right video format(10inch Vertical display screen video no more than 800*1280) into VIDEO file, picture into PIC file.
2: How long will be the video？
Our screen built in speaker, with internal 1GB memory for client to put their videos. So your video no more than 800MB will be ok to upload. And it will play in loop about 2-3hours after full charged.
3: Our Screen Not Support 1:1 format(picture and video)
Thanks for your understanding and support !
Product Specs:

5/7/10inch acrylic clear screen picture frame for countertop display
Screen resolution 854*480 IPS screen
Built in 1G memory, max to 8GB option
with built in 1000mah rechargeable li-battery, (Batteries not included)line+charger.
battery option.
support JPEG picture and video display
Buttons Control (On/Off, Mute)
each screen with colorful standard box

Note: When connect with your computer, operators pls plug deeply the cable in the screen, so computer can read the screen. If not, operators computer can't read the screen, only for power charing.