Indeed and even today's HDTV specification has elements based on echoes reverberating all the way from decisions made in the 1930s when specifying B&W TV.

The composite and component sampling rates (14.32 MHz and 13.5 MHz) are both based on being 4x a specific existing color carrier sampling rate from analog television. And those two frequencies directly dictated all the odd-seeming horizontal pixel resolutions we find in pre-HD digital video (352, 704, 360, 720 and 768) and even the original PC display resolutions (CGA, VGA, XGA, etc).

For example, the 720 horizontal pixels of DVD and digital satellite broadcasts was tied to the digital component video standard sampling the active picture area of an analog video scanline at 13.5 Mhz to capture the 1440 clock transitions in that waveform. Similarly, 768 (another common horizontal resolution in pre-HD video) is tied to the composite video standard sampling at 14.32 MHz to capture 1536 clock transitions. The history of how these standards were derived is fascinating (https://tech.ebu.ch/docs/techreview/trev_304-rec601_wood.pdf)

VGA's horizontal resolution of 640 is simply from adjusting analog video's rectangular aspect ratio to be square (720 * 0.909 = 640). It's kind of fascinating all these modern digital resolutions can be traced back to decisions made in the 1930s based on which affordable analog components were available, which competing commercial interests prevailed (RCA vs Philco) and the political sensitivities present at the time.