Sorry, but I didn't know where to properly send a bug report for a non-official + non-free iso image.
Reporting about: d-live nf 10.9.0 gn amd64 iso image.
I downloaded this image from Debian's link and confirmed with SHA512SUM.
Problem: When running live, Movie application will not play any video files that I possess (mpg, mpeg, mpeg2, mp4, mkv, etc.) These same files play perfectly using the current VLC player in my Ubuntu 18.04 installation. Just thought you might want to confirm whether or not this applies only to me, or is an issue with the live non-free image.
Thank you for your time and attention.