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The missile hit the Russian jet at 10.16 which impacted the ground at 10.24. That's 8 seconds according to the Russians, and if the times are in seconds, or if I'm even reading that correctly.
Note this could be verified easily by the video. Which I did, and the video shows it took about 25 - 30 seconds from the time the aircraft was hit until it impacted, though actual missile detonation is hard to determine from the video.
Sounds travels 1 mile in 7 seconds, and I'm quite sure the jet was well below that. And it descended at a fairly steep angle at the end. So my SWAG is it traveled 2 - 3 miles after hit by the missile.
https://www.youtube.com/watch?v=LwsrgyLQFuQ
With a accurate map of the impact site, one could independently calculate where the missile strike occurred with a good amount of accuracy. That would go a long way in verifying this information submitted by the Russian.
Another thing, If the Russians were totally off base / lying, I would expect counter charts / data from NATO about now.