Format Thumb Drive for H.264 to play on LG TV or most TV's

Hi,

I exported a 2 hour timeline to H.264 HD.

I have a 32 GB Thumbdrive that I formatted to ExFAT.

I dragged the 2 Hour H.264 (MP4) file onto the thumb drive then I plugged the thumb drive into my LG TV so I can watch it on TV.

It won't play on the TV. In fact it says "Problem on the USB Drive."

What am I doing wrong? How can I get it to work? How do I Format it correctly? I know I need something called "Master Boot". Where is that?

I am on a Mac Operating System High Sierra.

Any help would be great.