@Andrew *******
Rules about what is work and what is not work can be difficult in Thailand. Publishing content on a foreign website clearly will be seen as remote work, but shooting the video can be seen as local work which in fact is prohibited for DTV.
That does not necessary mean every embassy will see it this way.
The discussion about remote work also keeps going on for a long time, far before DTV.
Some see it as working in Thailand and not allowed unless your visa tells it is allowed, others see it as not working in Thailand, meaning you can do it with or without any visa.