Update 4
How to paint a Imperial Knight by Awaken Realms
Painted Imperial Knight by ThirdEyeNuke Studio
Magnetization of Imperial Knights by Blue table Painting
Imperial Knight painting guide by Awaken Realms
How to paint House Raven by  Warchef Ändy

Update 3
Building and Magnetizing an Imperial Knight by  ThePaintingClinic
Imperial Knight WIP 4 painting by John Stiening at 40k hobby blog
Painted Imperial Knight by MrTinypinhead 
Codex review  by Rob Baer at Spikey Bits
Codex first look by Natfka over at Faeit212 new and rumors
Codex review over at TemplarsCrusade01 

Update 2
Imperial Knight WIP 2 painting by John Stiening at 40k hobby blog
Imperial Knight WIP 3 painting by John Stiening at 40k hobby blog
Imperial Knight WIP painting over at Tale of Painters
Assembling the Imperial Knight by Murphy80
Unboxing & Assembling the Imperial Knight part 1 over at Pins of War
Unboxing & Assembling the Imperial Knight part 2 over at Pins of War
Painted Imperial Knight over at Agyar Studio 
Painted Imperial Knight (House Taranis) by Lil' Legend Studio Commission Painting Service
Review & Painting Tutorial for Imperial Knight by Colour of the Gods
Battle report with a Knight done by  Team0Comp

Update 1
Review and  assembly tips by Rob Baer at Spikey Bits
Tactics talk by Rob Bayer at Spikey Bits
Imperial Knight applying transfers by Games Workshop
 
Original post
Imperial Knight assembly by MrWatchingpaintdry

Imperial Knight cockpit by John Stiening at 40k Hobby Blog

Imperial Knight assembly by Games Workshop
Imperial Knight painting the skeleton by Games Workshop
Imperial Knight painting the armour by Games Workshop