here it is on a webcam
https://youtu.be/HgqNDAEh-Wc
a bit better.
for that modulator, the question was asked,,, digital or analog
and the reply.
Analog, NTSC Mono. The Information Sheet that comes with the unit includes a Frequency Table for the channels used with USA cable systems, of which, the first 13 channels are the same as over-the-air broadcast analog channels.