I've built wheels up around a bunch of hubs, from super cheap to moderate price, and I've not seen an issue with even the cheaper ones making noise. If you're only having issues when coasting, etc. then it sounds like the problem is with the freehub bearings rather than the hub bearings. I didn't get to listen to the video (at work) but you might be able to rebuild the freehub body and fix the noise.
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