1- Install latest version of PotPlayer
2- In NVIDIA profile inspector, select the DaumPot Player profile then set StereoProfile flag to Yes. Also add PotPlayerMini64.exe if you use the 64 bit version.

3- Right-click PotPlayer window > Open > Open URL... > paste URL > OK or Install PotPlayer YouTube Shortcut for Firefox or Chrome to send current/selected text URL to PotPlayer. You can even enqueue entire playlists like this one.
4- 3D button > 3D Video output (screen) > NVIDIA 3D vision, enable 3D and specify SBS like this

5- If your monitor's Aspect Ratio is 16:9, you can force it so you don't have to manually switch between half/full resolution SBS/TAB.

Troubleshooting:
- Frames flickering without triggering 3D Vision? Make sure your desktop resolution is set to 120hz
If anyone has issues or suggestions, let me know so I can update the guide.