0baht or equivalent available some Embassies are requiring this as a final account figure , some want it as a minimum balance over a period of 3 or 6 months.
Can you show your income from YouTube has been assessed for income tax and can you show this on your tax return that you will more than likely have to submit.
Visa is valid from day approved. You get 180 days on entry then you either leave or extend ONCE for a further 180 days after which you MUST EXIT Thailand and re enter. Each entry can be extended only once. The last date you can enter Thailand is the valid until date shown on your visa.
Print the pdf of the visa , there will be no visa sticker placed in your passport. For bank account it will be very difficult as DTV is just a glorified tourist visa.
Brokerage won’t, it will be up to the country you apply in as to what they will accept . Some want 6 months with a minimum balance of 500k equivalent baht.