You don't need a special visa to shoot in Armenia. Nationals of most counties don't need a visa at all or could get it on arrival.
You can see the list of visa-free/special visa regime nations at the Armenian Foreign Ministry website. There is a chance that the website info could be out-of-date, though. Drop us a letter, and we’ll clarify it right away.
Please pay attention that you need an accreditation from the Foreign Ministry to shoot in Armenia. There is an online form on the ministry's website.
However, even e-documents often get lost in Armenia. Contact us and we'll make sure your papers are safe and sound.