Blender Tutorial : Cross Eyed 3D video in Blender for VR Headset

Making a Cross eyed 3D video in Blender - Tutorial

Adding Custom Bokeh Shapes In Blender

How To add custom Bokeh shape in Blender.

Fake DOF for 2D image

Faking Depth of Field in Blender for a 2D image.
Fake #DOF for 2D image.

Correcting lens distorted image or movie

Most Simple but most useful trick to do when photo or video shot using  Wide Angle Lens.
Just use blender to correct that.