HereSphere has a PC and a Quest version. With either version HereSphere will control the Handy over wifi. No PC needed. HereSphere has a web browser, which will work with many sites - FapTap, SLR. But you won’t get a VR video experience playing that way - it’ll just be a flat screen within VR. There are a few sites - CzechVR is one, POVR is another - that support HereSphere’s API. That lets HereSphere display a VR gallery view for browsing scenes, automatically play video in the right format, fetch funscripts, etc.
Since not all sites support the extra features, xbvr is a way to basically host your own VR-enabled porn site for yourself. You are accessing everything over your local network, so HereSphere talks over your wifi to whatever device is running xbvr - a computer or NAS is typical. Once it is setup you can do everything from the Quest itself - no fiddling with the computer.
There’s a topic here on EroScripts for setting up xbvr that explains in more detail if you are interested in that route.
XBVR Guide - Host your own Video/Funscript streaming with Images, Previews and More! - howto - EroScripts