Website Video Backdrop Not working for iPad

Hi Pros,

I have a problem with my site design:

http://tutornauts.com.sg/

I am using Visual Composer for the video backdrop.

I have used shortcodes:

visible-m
visible-dt

so that the website displays a static image in mobile, and a video backdrop on desktops.

However, when accessing the website using an iPad, I get a blurred youtube background that cant be played.

Is there anyway to solve this?

Thanks in advance!