>>290403918
Blender addons are GPL, there's no such thing as a paid addon or blender addon piracy because of the license they have to adhere to, find a way to download it for free and you'll be able to import it.

Just get the download for better fbx importer/exporter for blender from that video, if you haven't found it, it's here:
https://www26.zippyshare.com/v/gMKlejlG/file.html

I'm not affluent, I'm trying to help.

For janitors/mods, this isn't piracy for the record.
Blender addons are required to be GPL, this license is very permissive and encourages sharing.
https://www.blender.org/about/license/