I demand that Vladimir Shved may or may not have written...

[Darren Salt wrote:]

...

I demand that Melvin Rimshaw may or may not have written...

...

I just wanted to add that in NA, some FTA channels lose sync on playback as well. It is still true that "live" viewing always works properly. This may change your hypothesis a bit.

"NA": North America? Not Available? ... Nobodies Anonymous? ;->

Only first choice makes sense, others not.

Despite that, it looks suspiciously like it may be a USA two-letter state code. (There tends to be an assumption, unwarranted IME, that "everybody knows what this means".)

Just wondering, how did you even come up with the other two?

Whatever quickly came to mind :-)