I have used DCTV and as far as I know it's only NTSC. I love the paint program.
If you can get your system to be NTSC, then you are good to go. Sorry I can't help with that. I'm an artist, not a HW geek.
btw: little known fact about DCTV
When we were making the HBO series "From the Earth to the Moon" we used DCTV to transfer Lightwave rendered files to video tape.
These LightWave files were the animatics (animated storyboards) of the Apollo capsules. They were sent to the director to decide how the final special effects would look like.
It was the last time we used Amigas in the company (except at home, of course). This was in the mid 90's