The performance is so slow it makes you sleepy, and you want more dynamics and singing; it's impossible to dance to this tempo. Performance speeds vary depending on the era, but this speed feels strange. It's a wonderful performance, but the conductor's musical sense has lowered the rating, and I feel sorry for the performers.
It is a ‘jazz’ waltz, play it a little faster with a slight ‘lilt’. A young group of musicians trying very hard, been there too. It will improve each time you play it and you feel more relaxed with it. Greetings from Tasmania Australia 🎼👍😁🇦🇺🦘