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What configuration should i use on my Nginx server to support byte-range (content-range or partial-range) for playing videos on Safari browser?

I have a website (coded in PHP on Nginx) with some videos in <video> tag. The problem is about Safari, my videos do not play in Safari. I searched a lot and used different video extensions and video tag attributes to solve the problem, But they did not work! Now I have a major question, for adding byte-range (content-range or partial-range) support to response header where do I have to change? Nginx server or PHP code? And If anyone knows about this problem I will be happy to see some clear guide for solving the problem.