Damn. I apologise. The livery looked like MAS colours so I didn't bother vetting the video. Still a horrific video to see.
4 people onboard, it's a military craft so they should have had parachutes, whether they used them or not I'm not sure. But to put it into perspective...
The plane in that video (An-30B) has a service ceiling of 27,000 feet and flies at 260mph.
MH17 which is a Boeing 777 has a typical cruise speed of 35,000 feet at 560mph.
So MH17 was at least 8,000 feet higher and travelling at more than double the speed. Although I don't know what speeds or heights the AN-30B would need to be at if they were indeed taking surveillance photos. I very much doubt they'd be doing their maximum speed/altitude in those circumstances so the altitude/speed differences would be even greater.
Scary stuff. But at least doing those speeds and that altitude the plane would have ripped itself apart in a matter of seconds and as someone said, the geforces involved would have knocked everyone out extremely quickly. That is at least a small crumb of comfort.