There's now a Plex Gear VR app, and also one for Oculus
Best Buy: Oculus Rift S PC-Powered VR Gaming Headset Black 301-00178-01
Plex VR for Gear VR & Oculus Go | Plex Support
Hands On With Plex's New VR Theater | Extremetech
Oculus Rift S PC Powered VR Gaming Headset Black Touch Controller, 3D Positional Audio, Built-in Room-Scale Insight Tracking, Fit Wheel Adjustable Halo Headband - Walmart.com
PLEX VR offers a mobile movie theater for your video library | TechRadar
Third-party VR Client for Plex is in the Works to Stream Your Own Media Library in VR – Road to VR
Plex VR App Goes Live on Gear VR, Oculus Go Supported As Well - Variety
Petition for Plex on Occulus Quest : r/OculusQuest
Best THEATER Apps For The Oculus Quest - YouTube
Oculus Go - Wikipedia
How to Watch Plex in Gear VR - VR Geeks
How to Watch Plex Using Google Daydream VR
Plex VR Brings Social Viewing To Daydream Headsets - VRScout
Daily Deals: 20% Off Plex Lifetime Pass, Save on the Oculus Quest 2 & Accessories, WD SN850 PS5 SSD Upgrade Back in Stock - IGN
Best Buy: Oculus Rift S PC-Powered VR Gaming Headset Black 301-00178-01
Plex VR Brings Social Viewing To Daydream Headsets - VRScout
Plex VR' App Comes to Gear VR, Social VR Viewing to Arrive 'in a few weeks' – Road to VR