Its not a hoax claim.
Fair enough. You're obviously allowed to make hoax claims, just in the proper section. Our moderator is quite strict about that.
I am not even quite sure what I saw. It is possible it was of the LM and not the CM.
That's understandable in the sense that the film showed lots of clips of both spacecraft during orbit and ascent, after the surface activity. Again, until someone can identify the clip in question there's not much point talking about it.
In that case, it could even be TV footage instead of DAC footage.
Not likely, as the television connection required a lot of effort from the crew and even more effort from the MSFN operators. Because the MSFN was not permanently configured for television -- they had to lease lines that were ordinarily given over to commercial use -- it was not common to have impromptu transmissions. Further, the ascent and rendezvous was considered one of the most critical operations of the flight. It's not a time when people would be mucking about with the television camera. The Maurer cameras, however, could be mounted in windows and left alone. For example, the terminal approach phase of the LM, which was depicted in the film, is actually at artificial speed because it was taken at 6 frames per second by the CM DAC mounted in a window. The filmmakers seems to have converted it at the 24-30 fps rate. Because if you play it back at natural speed, it's really boring.