Hi @abdullahth, @relex, and @salimkhan,
Sorry to hear you are having trouble. Is this with all videos or a specific video?
Please try these things to narrow down what may be causing the issue for you.
Try a different browser and see if the issue persists. (some of you have already stated which browser you are having the issue on, but please do try another browser if you haven’t already done so.)
Try watching this video to see if Vimeo is blocked in your location: https://vimeo.com/215897530
Check to see if cookies are causing the problem. You can do this in Chrome by clicking File->new Incognito Window. Then sign in to your raywenderlich.com account and see if the videos will play. If this resolves the matter then you can go to this URL in a non-incognito window to remove our cookies:
Check for content-blocking plugins.
Take a look in the console and send us any errors.
Send us screenshots of what you are seeing if the above suggestions don’t resolve the issue.
Please send me an email at email@example.com it you are not able to get the videos to play so that I can assist.