Google translate from the following Norwegian link. Apparently the incident with the MiG-31 happened last year.
The video is filmed from the cockpit of a Norwegian F-16 aircraft, and is taken up in international airspace last year.
It shows how a Russian MIG-31 fighters suddenly folds into front of one of the Norwegian F-16 aircraft from 331 Squadron.
The spontaneous reaction from the Norwegian pilot says it all about the drama:
"In hell!" He exclaims - before he pivots plane left in a tight evasive maneuver.
- We have seen some cases of behavior in the air from the Russians to show that they did not like that we are there, says Lieutenant Colonel Goran Hoel, commander of 331 Squadron in Bodø, to TV 2 , which first publicized the video.
Unik video: Så nær er russiske og norske jagerfly langs norskekysten - Forsvaret - VG
The following Norwegian released video also shows Su-34 Fullback.