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Hello @masouddarvishi1992,
Thank you for your query and we are so sorry about the trouble this must have caused.
This is likely happening because the video is being lazy loaded and when the Googlebot tries to access the video it shows outside the viewport because it has not been loaded into the page just yet.
You can also test the live page as Google sees it using this URL to verify the same: https://support.google.com/webmasters/answer/9012289#test_live_page
Looking forward to helping you.