Problem playing videos embedded in SL2 lessons on iPad/iphone via iFrames

Hi, 

1-I have created lessons in Sl2 with MP4 videos embedded. The lesson file is published for web use. 

2-The lesson is uploaded onto a website and made available to users.

3-The website is hosted on Amazon Linux EC2 instance

4- The lesson is accessed from the website via the html5 file on iframe.

Problem: The embedded videos won't play on iOS. They play fine on PC. Incase we host the SL2 output files in public folder on dropbox they play just fine on iOS.  It is just through our website that the video is not playing. 

Can anyone help?
 

 

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