It was Friday, a working day. But in Russia you are not so much attached to the working hours and often you can come to work later if needed. Finally, most of the priests also work (in Russia priests have civil jobs), but they are at the service.
Also look at the same Feast three years ago, in 2010, while Metropolitan Valentine was still alive. It was Monday, also a working day. But there were considerably much more people (look starting from 8:40): http://video.yandex.ru/users/ir-non/view/9/
I heard there is a sort of depression in Suzdal after the death of Met Valentine.