I've uploaded some new vides onto my Youtube account - youtube.com/tzitzernak from recent days in Yerevan. I'll upload more photos soon, some are up via my twitter account, predictably twitter.com/tzitzernak.
The question of how many people were there came up, as usual. Here is a calculation I did in the past for a friend. Liberty Square/Azatutyan Hraparak (AH) was not full by any means, and it was probably on average a medium packed audience. Here it is:
I used http://www.mapdevelopers.com/area_finder.php to estimate (by outlining) the square meters of AH. I did it three times to get the best estimate. I went horizontally out from the flat part of the cement stage, and through to the benches and walkways. These obviously will make a difference. I felt this was among the most accurate ways of doing the calculation.
The three meters square I got were: 6927, 6929, and 6994.
Loosely packed individuals: 1person/.93 meters squared
based on that, with the three calculations for square meters/surface area above, the number of peopel who would fit in AH, loose packed are: 7448, 7450, 7520
Tightly Packed individuals: 1 person/.42 meters squared
based on that, the number of people who fit are: 16492, 16497, 16652
Very Tightly Packed individuals = 1 person/.23 square meters
based on that: 30117, 30126, 30408 people fit
So, with loosely to medium, we'd be calculating somewhere between 7,500 to 16,500 - IF the whole thing were packed, which it wasn't. Maybe 60% full? So 4,500-9,900 - which I think is likely an overestimate from pictures and videos. But at least its a more consistent approach.