Apply a 3d object and a Background video footage respectively
Apply Set Channels on 3d object layer (in Effect → Channel)
Set Red, Green and Blue to the BG video (here is the beach BG)
Apply Gaussian Blur, amount to 50
Apply Invert, Channel set to Alpha
Apply CC Composite, set Composite Original to Stencil Alpha
Duplicate CC Composite, this time set to Screen/Multipy/Lighten(more subtle effect), untick RGB only
Fine tune the GAussian amount to change the softness of the light wrap result