[TOMT][MUSIC][2010s] WWII Fighter video, Do335

There is a channel "spottydog4477" in YT, it had a video of Dornier Do 335, uploaded roughly 15-17 years ago. Decent amount of views for black & white archive footage video.
The joke was, nobody ever knew, where the tune was from. Or atleast what I read the comments. Only questions, no answers.

Now it appears, that the video has been removed for "some reasons", no idea why.

The original referenced link alla over the net is : https://www.youtube.com/watch?v=jK8ydLY5QHQ

Very low expectations really to find a correct answer.
Basically ~only possibility is, that someone smart enough has downloaded it in time to save it.
I´m 99% sure the tune does not exist anywhere else.