No show video uploaded on the product editing page

Hello,

I have successfully uploaded a video ( 14 seconds), I clicked it and watched it on the product editing page.. both on my laptop and my cell phone. Please see below

However, when I get into my store and check out the product, the video is not there ( pictures always work).

See below

So where did the video go?

my theme is Debut 2.1.0, do I need to update it?

Please help! I appreciate it.

my website- www.ojewelries.com