Exporting to USB for TV compatibility

As said, it depends on the TV.

My LG 55" 4K OLED55B6V accepts FAT (MBR), HD and 4K (no preview thumbnails for 4K), H.264 and H.265 as .mp4 (and AFAIR also as .m4v and .mov).

Next time I must test if it accepts also exFAT (GUID). And VP9 video, and Opus audio...

It can playback at least 25, 50, 30 and 60 fps. As a test I encoded old Super 8 film digitized and encoded as 18 fps frame-by-frame -- LG played it but with some stutter so I encoded it with FCP as 25 fps with 72% "slow-motion" which yields the normal speed (18/25 = 0.72) with some duplicated fames here and there -- LG plays that smoothly.

I use "dot_clean -mnf " via the Terminal to remove dot files before ejecting the USB drive on the Mac so they don't litter the folder listing on the LG.

There is no sure way to deliver like this. The drive should likely be ExFAT formatted. The file should be MPEG-4 H.264.

In FCP you can use Export File and select Computer to create an MPEG-4 file.

If you want specific specs, you need to get that from the TV manufacturer. They're all a bit picky and slightly different. But like Tom says, a generic H.264 export from FCPX should be pretty universally recognized.

I use these settings for Wide Compatibility with most devices for reasonable results:

It works on most newer TVs, phones, tablets.

ExFAT for larger files over 4 Gig.

Also you can bump up the Frame Size to 4K with a file size bump as well.

It's all about getting the balance; user acceptable.

Al