Unable to import MPEG file into Apple TV's "My Library"

I have a series of 26 MPEG videos that I'd like to import into the Apple TV Library. Within the Apple TV application, I click File > Import... > browse for the parent folder containing the files and then click Open. The application successfully imports all but one of the 26 videos (the 18th video to be precise). All 26 MPEG's play back perfectly in Quicktime, but Apple TV won't import this particular one for some reason.

I've tried duplicating the file; moving it to another folder location; deleting the file, and downloading it again from my cloud server; and individually selecting the file from the Import finder window (instead from the parent folder). All attempts are unsuccessful.

After researching these forums, the issue is similar to TowJam60's discussion. Unfortunately I do not have an external storage device at my disposal. I did however attempt resetting the NVRAM or PRAM, but to no avail.

All videos are approximately 1.1 GB in size and encoded with the same codecs being Subtitles, AAC, and H.264. I'm using macOS Monterey 12.1 on a MacBook Pro (16-inch 2019).