Remarkable and stunning. The enclosures appear to be an unconventional combination of approaches. I believe I am hearing some standing waves at times in the playback, I believe it may be from the parallel sides in the horn like section of the enclosure.
It must be something a little more complex and richer as there are human voices, snake din-din, various percussion, some drums too. Unfortunately Shazam didn't get to find the title.
Funny that such speakers with silly low power, high distortion valve amplifiers always play this kind of undemanding music. But then I guess it would have too really!