My air cooled one is a lot quieter than that, in fact when I video'd it it was dead silent.

Then I found out that my Panasonic camera had video but no sound :heehee:

A word of warning with these spindles, some, not all of the Chinese sellers are specifying NSK bearings but they don't have NSK's fitted but a generic no brand Chinese bearing.

Unfortunately unless you strip one there is no way of knowing, many of the sellers are also just resellers and not manufacturers so asking a question isn't forced to get you a truthful answer.
The next bling gotta have is Ceramic bearings

Ceramic bearings from a well known maker are good for high speeds, not so well known makers are rubbish and the problem is, crash a spindle with ceramic bearings and they are toast, even the best ones.

Personally I'd sooner replace a set of decent bearings every year than take a chance.