It's hard to currently see what the problem is since your video link died (what I remember from it are flickering textures and stretched 3D models). Therefore, this answer will address general issues, that hopefully solve your problems, too.
You are going to have to change some .ini files: it's good practice - if not essential - to have these set to 'read-only' after you've made the edits (unless you're using Mod Organizer 2, in which case you'll want to use the built-in ini-editor).
You'll need to change a few things in Fallout4Custom.ini.
This file can be found in "Documents/My Games/Fallout4VR ":
sStartingConsoleCommand=cl off;taa off
//Turn off Character Lighting and Temporal Anti-Aliasing*
//Depending on you resolution. Can be set to '0'†
// Internal Super-Sampling. Don't use values > 1.
//These last two lines are mandatory if you're using mods - they won't affect VR performance.
- Turn on 'Enable Always-on Reprojection' in your SteamVR settings.
- Enable 'Allow Asynchronous Reprojection' in your SteamVR settings.
- Use additional mods to increase performance. Some can be found here. More can easily be found by searching online.
- Opt in or out of the SteamVR beta.
If your in-game height seems off, you can change your avatar scale in Fallout4VRCustom.ini, in that same folder:
// Tweak this number to get the right height.
// '80' seems to work perfectly for a person 5'7" tall.
If you prefer keeping TAA enabled, consider using the following settings:
Here's a comparison gallery. Be sure to read through the linked thread, as it discusses the changes.
iLocation X=160 and
iLocation Y=90 for a 1080p monitor and running the game in 900p (iLocation X=1920-1600/2) (iLocation Y=1080-900/2). With these settings, the game window will be centered on the monitor screen (redacted version of information provided here).