Earth divided

Some things make more sense with additional context. Like, Europe was on the PAL standard while Japan was on NTSC, so even if you put them both in the same region, they couldn't watch each other's discs, so the region code could be re-used without it actually conflicting.

An invented creation used to segment regions of the Earth in homebrew RPG campaigns :P

I see no borders from up here my modded console.

I guess it could be used in many different ways, but when I read it I thought of it in the context of a homebrew campaign's lore (maybe ttrpg memes have corrupted my mind?)

Worldbuilding aka lore

That chart says Vietnam is a mix of 220 and 127 V at 50 Hz. There might be some places that use 127 V, but it's certainly not anywhere close to an equal split. Everywhere I saw had 220 V.

Region code 0 ("Worldwide") discs work in all regions: https://en.wikipedia.org/wiki/DVD_region_code

Everywhere

There's three regions missing here - region 0 is "worldwide", region 7 is "special purpose", Oscar screening DVDs and the like, and region 8 is "international waters" for cruise ships and things. You can set several regions on the same disk, to make a 2/4/5 and the like. Set each region as a bit, and you can store that in a single byte - that makes it very easy to flash the firmware on DVD players to decide which disks they can play. Aus/NZ will want content in English and Latin America will want Spanish or Portuguese, so the DVD consortium can still get up to their often-illegal, certainly immoral, price fixing and bullshit.

Really, fuck DVDs. So much potential in the increased capacity, and then it was mired in crap like this and "disabled user operations" so that you can't skip trailers. Time to raise the black flag and set sail for prosperous waters, me hearties.