I'm guessing that in due time some these videos will be released. It's still very early and they want to comb through everything and every person on any video, anyone who shared an elevator with him etc before they release. They don't want to have a video released and the public sees something they missed, or an accomplice goes off the grid because he sees he is suspected of helping him.
One thing is for sure, for anyone looking at conspiracies and what have you, there is no way that the full and complete story doesn't see the light of day. There will be far too much pressure from the deceased families and the public. Some of these impacted were off duty cops, nurses, lawyers and many hundreds were impacted.
America will demand that this is done right. If not, Vegas stands to lose a great deal of money as people will have doubts about their safety, regardless of how irrational that is. This is the medias job also, to push for more details and information.
The problem with incomplete information is that it allows the imagination to fill in any missing details. You might recall that early on after the attack it was reported that a Hispanic woman was thrown out of the venue with her bf, and she apparently told these people "a lot of people are going to die tonight!" Everyone assumed she must be involved. More than likely, it was some drunk woman making empty threats in a moment of rage. They probably went home and dealt with a hangover in the morning, very fortunate they were thrown out of the venue as it were.
To me, as was stated, I lean to gambling problems/marital issues. Hell, she might have even had left him because of his gambling problems or debts. Without question, they need to talk to her on U.S soil, and the fact she isn't back in the U.S yet adds to the suspicion. Also, why did he have her Players Card that identified her on his persons when he committed this heinous act?
One final point to debunk any conspiracy theorists. There are literally hundreds of people from multiple police forces, including the FBI investigating this. If there was something not on the level in these videos, or someone else bringing bags into his room, someone would have leaked this information to a news network for a great reward. They wouldn't even need to remain anonymous and worry about repercussions as they would receive global support.