Ya. You are still as thin as a stick with 6 packs. Very nice view you got there. And oh, how do you propose a THIN guy get his wing like lats on his back? Without the lats, shoulders, your 6 packs will be a girl's waist.

back and shoulders aint the only factor that contribute to V shape illusion. Chest is also one of em.

So thin flat chest gives you a 2D view on your V-shape?

Any comment on my back?

Ain't no expert but that video is useless for your goal. Train your lats. There's no fastest way, just lift > eat > rest.

here's a list

nice, maybe wear your shorts lower?