In the video with Russian voices they don't say anything special.
I heard a lot of
- "Davay-Davay" - come on, come on! /move it! :o)
- "He goes full-loaded"
- "He's got to try to land, no choice"
- "And how will he land, he'll smash"
- "Hold on, boys, just hold it, hold it!"
"Yest'!" - that's not English "yes" :o)) just sounds similar, it is "it is". Like, I AM, he IS, it IS - "it is", in this case.
That's also what Russian military and Navy say to the command, as a reply
"Yest'!" Like, "as good as done!" "will do it, Sir". eh Tovarisch :o)))))0