He knew direct feed didn't record sound.
He put the MAME recording on a tape to cover up the splicing and explain the lack of sound in the gameplay.
He orchestrated an event with a direct feed arcade setup and performed.
The few folks there were kept back too far to see the score closely while he played (later this was turned into a 100 people and everyone was watching which once put into print becomes the mantra).
He "get's" the record, claims victory, and hands his bogus tape over to Todd (or whomever).
the rest, as they say, is history.
Bottom line, this is not a crazy scenario. If you read about master forgers and con men, this is a pretty straightforward and simple con. It literally takes no one except Billy (and one other person willing to stretch the "truth" in a seemingly inconsequential way)to pull off. Think about it:
If we gave Todd the benefit of the doubt: I can imagine Billy calling him up one day and saying "I've got this tape with this score I just got. It's direct feed. I'm going to submit it, but I was thinking it'd be better for TG publicity-wise if I "do" it live. We won't be lying about the score, we'll just stretch the truth about when I did it for the greater good" Todd says, "yeah that makes sense."
Billy calls Robert and says "Hey, I need a direct feed machine set up, I'm going to do a live DK attempt." Robert says , okay, and sets it up.
A bubble is set up around Billy while he's playing that doesn't allow folks to get too close for distraction purposes. It's close enough that they can kind of see the screen, but far enough that no one wants to stand there watching continuously for a couple hours. When no one else is standing there, Billy says, "hey, I did it, I broke the record" all he would need to do to even show the record on the screen is score 62,800 and then end the game since he supposedly killed off his men.
There might have been 100 people there. It is an arcade after all with an event going on. When I set my Dr. Mario arcade record at Funspot there were at least 200 people there that day. There were only about 4 watching when I broke the record though.
All of this creates this "huge" group of people that according to camp Billy can't be in on a conspiracy of this magnitude. And yet, when it gets broken down, it turns out it just takes Billy creating a con, and Todd telling an "inconsequential" lie to fabricate this entire thing. Everyone else could literally do what they were supposed to by the book (Robert's description of his direct feed set up for example seems legit) and it would seem like the record was broken that day.