You're talking about roar of Merlin engines and nowhere in YT video you didn't mention that you use Diveplane mode, at least I have not seen.
Otherwise, I agree with DavedRed. I've also tried Diveplane mod but I went back ED sounds. For me the sound of the engine is too high. I prefer the sound with more bass and during taxiing and take-off and landing at'd like to hear more tiny clinking and tapping, For me the sound of the engine is too high, and biting. I prefer the sound with more bass. During taxiing, take-off and landing I'd like to hear more rattling noise, tapping, perhaps mild creaking when braking. Also I hope to we get enough specific moans and whistler during dive.