It seems people like more when somebody fails than succeeds in something. Unfortunately! And that's exactly what happen here to Ilya Zakharov with this belly flop. Besides, being an Olympic champion it makes the whole fail thing even more appealing to many. Again, unfortunately!
So, the answer to your question 'why this video got so many views' would be almost the same as it would be for:
Why the bad news always gets on the cover page, have biggest headlines, are the first on TV, radio, etc. news? ​