Site not fully loading on iphone, safari 9?

Question

iPhone

Good afternoon, I noticed one site buytimeinc.com, it is cross-browser. But the page does not load on my phone, I decided to check everything works fine on android, I downloaded the latest version of safari 5 for windows, it works fine.
The question is why is that? I need it for myself, since the novice coder does not understand the reason for me.

Answer 1

I found it a long time ago, so I decided to write that the matter was in the youtube player that was on the page. safari sees it.

Answer 2

no one tests safari on Windows
safari should be tested on apple devices
in the old safari there was no restriction on downloading content from third-party resources, a few years ago safari began to block such content from other second-level domains, which is what the console in safari shows