You can upload videos on your Sato account from two different places.
After creating a new video player, Click on “+Add Video”

A pop-up window will appear where you can upload a video from your device or choose from an already uploaded video.
To upload from your device, click on “Choose from device”

The file picker window will appear and you can now select the file from your device.
Once selected, click on “Upload” and the video will be uploaded on your Sato video library and linked with the Sato video player you created.
In case you want to change the video you just added, click on “Choose another” instead of clicking on “Upload”

Once your video is successfully uploaded, you can see the video file name added next to the “+Add Video” button