The only context for this video comes courtesy of YouTube, which is in Russian. The page, awkwardly translated, reads like this:
"Video shot in the Tver region. Andreapol district village Toropatsa. He touched me, barely dodged on all fours, even one shoe fell off his feet and the camera fell. Those who have seen the teeth of beavers will understand me. Come and beavers at all enough."
Suffice to say: this guy lived.
However, it seems the risk may have been graver than you'd think. The Telegraph is reporting that earlier this week, a beaver killed a man in Belarus.