hello @TeamYouTube why am I seeing gray videos 



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from mobile its fine basically from my laptop when i upload one and a half hour livestream it gets freezing.
Thanks for clarifying. Have you tried clearing your browser's cache and cookies? Here's how: https://goo.gl/dwzcyo . Also, does this happen across browsers & on Incognito mode? Keep us posted.
yes i have done it but now my streaming completely fine. I want to ask you a question why some videos shows 360p 480p 144p 720p 1080p 2144p 1440p please clarify.
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