I made a short calculation: 854 / 510 = relation of 1,675
new width of 760 / 1,675 = new heigt 0f 453 ( ~ 454 ? )
My 1. calculation was wrong… with 480 instead of 454
Edit :
I hd a look n your video now - woth ths calculation:
700 / 1,675 = 417 ( not 450 as now ) .
But this is more an optical question..