Roku TV app stops playing shortly after start of certain files

I don’t see any “remote” logs for that user, so I’ll go off of what you included here. From what I can tell, the Roku believes the video is finished, e.g. currentState=finished. This usually happens when there is a container issue. It may play in other clients OK, but the Roku OS is a bit picky here. I’d suggest running the file though mkclean and replace the file with the output.