There are a number of players that can be used and they can be located on the tempest discord.
I am also providing a WIP manual with setup instructions with the device. It is a green QR code.
In the player you connect to the device and then usually drag and drop the video you are trying to watch and as long as the funscript file has the same name as the video file you are playing the script will load automatically.
By the way, here is a discount code and brief update I created another topic for. I will link it to this post as well.