This is just an ad. I don’t know why Unity doesn’t want LGPL software on its storefront, but it has every right to ban the license if it wants to. As demonstrated by the consultancy part of this business still existing, there’s no technical requirement to order your unity assets through the Unity store. Plus, the agreement speaks in no uncertain terms when it comes to (L)GPL code, it specifically mentions those two libraries.
I’m not a fan of someone starting a company “Videolabs” with an orange traffic cone for a logo, selling VLC integrations. At first I thought I was on the VLC website.