DTV remote work - Thai embassy Berlin
I had a phone call with the embassy and as a german citizen it is a requirement to either have a german company or be employed with a german company. At least that's how I understood the woman I was talking with. I have a foreign company and live as a nomad so applying in Germany is out.
Also asked her about medical treatment. Since this visa is so new they haven't had a case yet and don't know if a single appointment for a treatment in Thailand is enough. It definitely needs to be an official document from the hospital. But the embassy in Berlin might forward this kind of application to Thailand to evaluate if they would approve the visa or not.