I was interested in those total viewer numbers as well. When I checked into the live stream there were generally 100-200 viewers. Sometimes it would dip down to 75, and sometimes it would peak around 500 viewers, and i think i saw 700 once.
I looked it up and found that Facebook counts a view if someone watches the video for 3 seconds.
So if you look at the Facebook page and see the live stream moving, it will count as a view after 3 seconds. According to the analytics guys, if you go back in 5 minutes and see how SVB is doing now, it will add another view. Every 'start video playing' whether it's autostart or not, will trigger a view increment in 3 seconds.
An example they gave is of a video that 'reached' 4000 people, had 1300 'non-unique people' view it for 3 seconds, and 560 non-unique people view it for more than 10 seconds. The average view time was only 26 seconds.
So one person who checked in periodically over the course of the day could have been responsible for 500 of those views.
Facebook doesn't 'freely' provide engagement data, like how many different people viewed this video, or the median and average viewing times.
I don't know if 'likes' are more meaningful. They do actually require that you click something so maybe they do mean something. Of the three SVB videos from yesterday, there were 43 likes, 65 likes, and SVB's 308 had 101 likes.