I'm so confused.

Hi - I've recently downloaded a TV Show and copied it onto a USB so that I can play it on my TV. There are 22 episodes here, the first 11 can play on the TV no issues, but then episode 12 onwards my TV says "File not supported". I have no idea why this is the case because I've checked the formatting of the files that do work and it's EXACTLY THE SAME as the ones that don't work (unless I'm missing something, which is of course possible). If anyone has any idea or knows how to fix it, please help! 😭