I still wouldn't believe it's that black and white. You have a center and a QB that go to and remain in position to start the down. The offense goes right to their positions and relax. Don't know what was said on-field but from physical actions, Im not 100% on a flag here.
Definitely leaning your way, AlStripes. Without hearing anything sinister, or deliberately misleading, I see a team set, two players legally in the backfield look to their sideline (maybe they just forgot their assignments) the ball is snapped (maybe just a mistake by the snapper).
Many teams teach players when there is a "clusterXXX" and everything breaks down, fall-back is everyone immediately do what was planned for inadvertent clusterxxxxx, which for a receiver may very likely be "go deep".
As for the defense, assuming the RFP was clearly blown, everyone should be on full alert and ready to react and respond. So the question is; was this simply a broken-play, and one team was far better prepared for such an emergency, or was this a really devious deliberate illegal effort to deceive.
If you are ABSOLUTELY sure of the latter, and believe you are PREPARED to appropriately defend your assessment, it's your flag, but it seems, by what's provided on this clip, the evidence is extremely doubtful and it's your choice to gauge the thickness of the ice your about to step out on.
As for 9-10-1 Situation B, unless you have some pretty convincing verbiage to back up your judgment, the ice you've now decided to stand on, doesn't seem capable of supporting your call (unless you have a professional mind reader standing by, who'll support you.)
When you really have to search for a foul, you'll rarely ever REALLY find one.