And we liked it that way!
Personally, I think this is much ado about nothing. The broadcast images were of poor quality, and I don't believe there are any "high quality" images, just more perfect records of the original poor quality images.
There was a big improvement in image quality in later missions, but this was its whole own story. Some start-up company approached NASA with their image processing technology, and NASA bought it, and it was good.
That is incorrect. The video camera system used on the lunar module was designed to minimize bandwidth and battery power (and the weight of the addtional batteries). It sent a 320 line non-interlaced signal at 10 frames per second.
The old NTSC broadcast standard that was discontinued last month has interlaced 525 lines at 30 frames per second (about 480 for the picture, the rest between frames), while the PAL and SEACAM systems has interlaced 625 lines at 25 frames per second. The video transmitted around around the world had to be converted from the non-standard video transmissions from the lunar module to other standards like NTSC in the US, PAL in most of Europe and Australia, and SECAM in France (the Soviet Union didn't carry the video). Nowadays one would use a digital scan converter. Back in 1969, it was done mechanically or optically. Getting the original signal recordings would allow the video data to be converted to digital and digitally scan converted.
TV from the Moon
The television camera taken to the lunar surface was a Westinghouse designed and built slow-scan black and white camera with a vertical resolution of 320 lines scanned at 10 frames per second. This camera was chosen because the available bandwidth from the Moon (500kHz) was not sufficient for a standard TV signal.
On Earth, the received slow scan signal was converted to a standard TV picture (in this case, the American standard of 525 lines and 30 frames per second) using specially built scan converters. At Goldstone and Honeysuckle, the conversion was done on site. The Parkes slow scan TV signal was sent to the OTC (Overseas Telecommunications Commission) Paddington gateway exchange in Oxford Street, Paddington, in Sydney and converted there.