Let's say I'm the time keeper/RD. You got flagged as cutting the course. I DQ you. You go and find the video link that I uploaded to tell me that, "if you look in the upper left hand corner of the video 1 and 3, you can see me run by." Well, someone has to go and dig up that video to analyze whether your statement is correct or not ... that's not 0 labor. Say I have 2 cameras out on the run course and 3 on the bike course at key turn points. That's potentially 2 videos that I have to upload and then analyze if you decide to protest your DQ. Now, if I want to be really thorough, I may want to do a sanity check on the other 3 videos to make sure that you were seen. Multiply this by 5-10 athletes, which Sportstats said was on the low side, and all of a sudden you are spending a lot of manpower.
Then, there's the cost of hosting those video on a server somewhere for long periods of time. The cost may be minimal, but there is now a new cost that I have to worry about. Like I said, doable for WTC ... not so much for smaller races where they are already at the margins.
I would submit that it would be 0 labor other than uploading the video,
Cameras are cheap, but the human resource to go through and analyze all of that isn't. Sportstats said that, at one race he did, there were 30+ people who were DQ due irregular splits. He also mentioned about how busy they are during and after the race. Imagine that they spend 1 hour, per athlete, reviewing and analyzing the the data. Then, you just say can't verbally that you saw strange things at x minutes. You have to write up your finding formally, if the athlete decide to protest. What if the athlete then say, "show me the video! " You would then have to spend time retrieving it and showing it to the athlete. That takes time and human resource also. By the time you are done, say only 5 athletes protested, you could be spending 3-4 hours per athlete gathering an documenting all the artifacts. Perhaps WTC can absorb the extra cost/manpower to analyze the pics, timestamps, etc. Those smaller races, where are they going to get the money from?
Cameras are so cheap now, there's no reason a GoPro can't be set up with a volunteer at a turn around or any suspect point.
Even at 5 fps or something. That's basically what happened with Rossi - there was a photographer on the bridge and with so many runners he basically took a video stream.
like a public record. Let the other competitors do the analysis if they're suspicious or curious. It would also put to bed a lot of wrongful accusations as well. "I think Bob cut the course...<watches video>... Oh there he is, never mind - I'm an idiot".
One of the obstacle races did that - it was a single video, 8 hrs long and you could jump to whatever time you want and see for yourself. If that was the turn around on a road race it would be great, and easier to setup than a timing mat. Also don't disregard the reduction in cheating if people know there are random cameras that other racers can look at later.
My marathon PR is "under three, high twos. I had a two hour and fifty-something."