javascript - Youtube video won't play on modal -

i've implemented magnific popup plugin. may find here: http://dimsemenov.com/plugins/magnific-popup/

and test site: http://planet.nu/dev/test/index.html

unfortunately, can't seem video play. display error. i'm not sure why it's that.

here's jsfiddle: https://jsfiddle.net/jl2u6gqs/

i can't enter full code here it's long. please @ jsfiddle instead. thank you!

<a class="video" title="test title" href="http://www.youtube.com/embed/j6cxzp4ii6c?autoplay=true">open video</a>

change href url format not embed url

https://www.youtube.com/watch?v=j6cxzp4ii6c

the "https" important