You won’t be able to loop the footage since the clouds never repeat in the same fashion. You can stagger several copies of your footage and blend them slowly.
I remember using Digital Anarchy’s Aurora to create loopable skies.
the gauges look really cool, I’ve done something similiar a while back.
The only thing I did different was to add camera shake with motionblur for greater realism (by linking the gauges with motiontracker to the cockpit)