DTV approved in Hanoi. Easy process, courteous staff.
Made an appointment online though it doesn't seem to matter, there's been almost no people there the few times I've been.
Docs they wanted were:
* 6 months of bank statements
* employment contract (the staff made me believe it needs to explicitly state "remote work" - mine didn't but apparently it's not necessary as it went through)
* apartment lease in Hanoi (a hotel booking would also work) as proof of current location - apparently my physical presence in the embassy or the stamps in my passport weren't proof enough that I'm actually there
* deposit slip for accommodation rental or hotel booking in Thailand
* filled out application (had to write in DTV because it's not yet an actual category on the official visa application :D) and photo
* $340 - I paid attention to give very clean bills, they didn't really check their integrity at all
... That's it. Done in 2 days. Here at least, they look at face value at whatever you submit, there are no deeper checks.
Grab it while it's hot, not sure how long a deal like this can last before it becomes apparent that it's too cheap and too relaxed criteria.