I’m posting this here to help others that may have some issues with loading files from USB. I am using the Hypno Kit with a Raspberry Pi 4B and firmware 2.2.3
I was trying many different USB sticks and SD cards formatted NTFS, FAT32, exFAT. Even tried with the stick in when powering on and nothing was working. I was attempting to use the videos from the free pack.
Today I tried formatting ext4 and it works, but not right away. I had to power cycle with the stick in and it loaded a video. I am now also able to select different videos from the stick.