Just use an agent, but I would question the need for a bank account in Thailand except for scanning, which can be accomplished using cash. I have two bank accounts, and I stopped sending money to them except once in a while to keep them active. Now I exclusively use US bank-issued CC (multiple advantages like fraud protection, cash back, etc.) whenever possible, or I withdraw cash from ATMs using a US-issued ATM card (ATM fees are refunded). I started doing this after COVID-19 and never felt any need for Thai bank accounts.
Mike Vineyard I am not here to post rules. Why are you asking questions here, then? You don't know how to find rules for your visa application. I think you want to cheat and are trying to get approval from others. As I said, it's up to you. You want to cheat; go ahead and cheat, but there can be consequences for that; if not caught, you will win.
The rule remains the same. Of course, you can always cheat but lying in a visa application is a criminal offense and can be barred from entering for the lifetime. Do it at your own risk? Are you so desperate that you cannot even go to a neighboring country, or you are doing it for academic exercise?
You are supposed to apply for DTV to the embassy/consulate where you are located when applying. Do you see a Thailand Embassy/Consulate in Thailand? If you can find one in Thailand, you can apply there.