Sorry, I just don't see what you see. Can you give more specifics than just the time on the Single Player video?
What he means is that if you pause at 0:59 seconds on the first video, the dogtag that is dropped in Kill Confirmed has Simon "Ghost" Riley engraved into it.
The dog tags mean nothing. In fact, if we can pick up his dog tags, he is most likely dead. The guy in the single player video looks more to me like a Russian soldier, with a gas mask on. In MW2 without the no clip, IW make it look like both Roach and Ghost got burned. The fact the fire was only around Roach and not Ghost (Seen only via noclip) was done for cinematic purposes. Ghost is dead. He was shot in the chest (or head?) by Shepard, then his body was burned with Roach.
The following user groaned partypoker15 for this awful post: