Gonk-DB94 said:
I’m not a tech-wiz but I don’t think an .iso file will play on most standalone blu-ray players.

As far as I know, most players will play a standalone .iso file. I’ve used .iso files for the NJVC and 4K## projects and they’ve been fine.

As far as your issue is concerned, I have to ask. Did you get the official .iso, or did you create an .iso and just throw the video file in there? An .iso has instructions for the player on how to play the disc, so if there is just a video file inside the .iso, it’s likely that your player can’t play it because it doesn’t have any instructions on how to.