NPR had a story about the NASA engineers who made the camera equipment for that footage. The equipment sits on the moon. The engineer is 84 years old now. Anyway, in the interview he said that the footage shown on TV was of a much lower quality than the original recording, because the format of the original recording was made specifically for that mission to obtain the highest possible quality.
The engineer wanted to convert the originals using today's technology to preserve a better quality video of the event.
A team of people at NASA searched for the original recordings for 3 years and could not find them. Their conclusion was that the recordings were most likely erased in the early 80s. At the time, US had really increased its spy satellite capacity, and there was a shortage of magnetic tapes. So in a 2 year span, NASA had permanently taken back 40,000 boxes of tapes from the national archives to be recycled and used for the satellite program. Their conclusion was that the tapes were destroyed as a part of that :nonod:
They settled for a digital remastering of what they could find.