I have a film in 20-30 seconds freeze - fast forward by 20 seconds - is a little more - again, freezes, etc.
This is the USB on the front panel and it is big flash drives. I have all the big flash disks - one 16GB, one 32GB,one 64GB Transcend.
Firmware - any, including 1.07.15.
Movies - tested different.
ADATA 4GB - it’s OK.
With flash cards on 16/32/64 GB Transcend, inserted into the USB back panel - ALL movies are playing.