Why hangs the page?

Hello, please tell me why hangs the page in the browser?
When you scroll down a bit till the video freezes the page for about 30 seconds, then let go, then again hangs. There are start-up video, but on another page it hangs. What can you do to correct? Maybe the console that tells you?
June 14th 19 at 18:25
1 answer
June 14th 19 at 18:27
Try press Ctrl + R, everything is fine no crashes, only the layout of the header it is necessary to correct, in some places it is without padding:

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