Posted on youtube a video of this TV set fed by that modified DVD player I recently posted about. Here the player is playing a DVD of the NY Giants 2007 season.
https://www.youtube.com/watch?v=LUNw7I3GkeM
I managed to get a reasonable picture with a decent image on the CRT, didn't need to photoshop it.
In the upper left is that DVD player. Under it is a Heathkit audio amplifier we put together back in 1978 (not involved with the TV work).
I got the TV modulator to work well. The biggest quality improvement was to use a local voltage regulator chip dedicated to the modulator. Also had to tweak its sound subcarrier oscillator (it was slightly off, which made for beat patterns if I select composite video to feed it).