Logo Issue + Lightbox Issue

Hi,

My logo is not showing up sometimes. It works on mobile but not on desktop sometimes.

Additionally, I've got a nice light-box working but some browsers allow to keep scrolling behind it where I'd like for it to be locked in place. This is bigger issue on mobile.

Here is a live link: http://pborgerding.com/ElitePatrick/#

Also, if you have any recommendations for compressing my video file so it loads better for slower computers, I'd love to hear it.

Thank you,
Patrick