At the time the video was posted, the plane in question was still visible on flightradar24.com. when I put my cursor on the RED plane in question, the data shown in the video came up for me, indicating the Russian plane in question. The plane was red and "no call sign" came up when my cursor touched the plane. When you click on any plane, the individual data appears. If you go to ABOUT on flightradar.com, you find this data base info: http://www.flightradar24.com/how-it-works

How it works

Flightradar24 is a flight tracker that shows live air traffic from around the world. Flightradar24 combines data from several data sources including ADS-B, MLAT and FAA. The ADS-B, MLAT and FAA data is aggregated together with schedule and flight status data from airlines and airports to create a unique flight tracking experience on www.flightradar24.com and in Flightradar24 apps.

SNIP-read on for more info

Lymerick