ExFAT is definitely the choice for both macOS and Windows, but maybe not the TVs (maybe few support this).
FAT32 has a size limitation of 4GB on a single file. So, if you are dealing with movie files,
FAT32 is definitely not a good idea. (I didn’t know this a long time ago, so what happened to me was it allowed me to copy the files that are bigger than the limitation onto the drive but once I ejected and remounted it back, the files are corrupted)
So, we’ve come to the conclusion that
NTFS is a good choice for storing movie files on a pen drive so that they are readable on all devices (macOS, Windows, TVs). The only problem with
NTFS is that you have to install a driver on your Mac in order to grant your Mac the ability to write on an
NTFS drive (since Mac doesn’t support writing data onto NTFS volumes). In this case, Paragon NTFS for Mac is recommended to achieve this.
Still, I cannot guarantee you that your drive is 100% recognizable by your TV, it also depends on your TV, usually in common sense, it should support both