Some time ago I read an article about the VR-shows on istripper. I know you need a VR-headset to be able watching the shows properly after you bought them.
Where can I find the article ?

Salut @batavus
Nous avons eu une discussion sur le VR dans la rubrique : Aide pour les Francophones 😊

https://www.istripper.com/vr180/howto/

By the way, see my Screenshot 😉

It might not be obvious from that howto page, but the new Oculus Quest 2 VR headset also works (and wirelessly).
The Quest 2 Skybox app can be used as the VR player.
Using a PC DLNA media server app, like Plex or Jellyfin, your VR files can be stored on your PC or external USB drive and wirelessly accessed on the Quest 2 via Skybox. I like Jellyfin "Music Videos" category for this purpose with metadata all toggled off ... I don't need the media server attempting to map these files to other media.

Also, iStripper desktop can be wirelessly viewed using the Quest 2 Virtual Desktop app. It isn't VR, but your view is only the girls.

Skybox and Virtual Desktop add a small cost.

The Oculus Quest 2 does require a Facebook account, unfortunately, so I don't think it's available in all countries.