Sportsbooks and ingame odds

I realize that most of the lines are generated from some kind of algorithm, for instance a soccer game that has an over under of 2.5 -110 the under odds will increase as time increases, but there has to be a human element involved as well.

For instance, one night there was almost nothing to bet on except this Russian U19 soccer game. I'm a degenerate so I threw a few nickles down on the total, and I found a live stream. These guys were 17 year old high school kids basically playing at this tiny field, and there were maybe 20 people watching the match. Now my book SIA had the live ingame and sure enough, everytime something happened, like a goal, yellow card or injury, the odds would go off the board and get calculated again, and then pop back up. My point is, no computer can do everything. There has to be an actual person in a room watching 20 games at the same time and entering data into a computer which will adjust the odds accordingly.

At least this is what I think happens. There is almost no information available on this topic, and I assume it's because the books don't want you to know too much about how the system is run.

I'm curious if any of you guys can shed some light here.

Thanks.