Sorry if I revive an already existing thread, but this information might be useful to retro computing fans living in NTSC countries.
I think the easiest way to connect retro computers to TV sets is by using SCART cables, which were unfortunately unknown in the US, Japan, etc.
As I didn't want to spend a lot of money on video converters, I have decided to get my own SCART connector here in Japan.
Here are the parts I had to buy:
https://www.ebay.com/itm/Amstrad-CPC-464-6128-High-Quality-POWERED-RGB-Scart-Cable-TV-Video-Lead/261898189777?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m2749.l2649 (https://www.ebay.com/itm/Amstrad-CPC-464-6128-High-Quality-POWERED-RGB-Scart-Cable-TV-Video-Lead/261898189777?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m2749.l2649)
https://www.ebay.com/itm/YPbPr-to-RGB-SCART-transcoder-converter/174151197808?hash=item288c386470:g:3GsAAOSw6QJdJDXo (https://www.ebay.com/itm/YPbPr-to-RGB-SCART-transcoder-converter/174151197808?hash=item288c386470:g:3GsAAOSw6QJdJDXo)
https://www.amazon.com/AmazonBasics-Com ... 194&sr=8-1 (https://www.amazon.com/AmazonBasics-Com%20...%20194&sr=8-1)
(and a USB C cable for power I already had)
Provided your TV set has YPbPr input, you can have an easy SCART connector for quite a good price.
:)