Rok, the procession you posted was solemn and quite respectful as befitted the person to be interred.
It seems to me they knew what the person being interred would want the most; Dr. John,s was both garish, and raucous as he would have wanted it, as he lived. There might have even been several "Second Lines" honoring Dr. John.
https://www.youtube.com/watch?v=KWCebWXTfFI
https://www.youtube.com/watch?v=r6nKDKpX_h8
https://www.youtube.com/watch?v=BdjgkOI6SbU