Lux Vimeo not showing up on https site

It seems that Lux Vimeo creates the iFrame without looking at the parent protocal (http vs. https):

HTTP site iFrame code:
<iframe src=’http://player.vimeo.com/video/83451677?title=1&byline=1&portrait=1&color=&#8217; width=’400′ height=’225′ frameborder=’0′></iframe>

HTTPS site iFrame code:
<iframe src=’http://player.vimeo.com/video/83451677?title=1&byline=1&portrait=1&color=&#8217; width=’400′ height=’225′ frameborder=’0′></iframe>

Since the iFrame is HTTP (instead of HTTPS) on the page served through HTTPS, it is not loaded.

The solution is to modify the code as follows (line 36/37):

$ssl = is_ssl()?"s":"";
return
  "<iframe src='http$ssl://player.vimeo.com/video/$clip_id?title=$title&byline=$byline&portrait=$portrait&color=$color' width='$width' height='$height' frameborder='0'></iframe>";

https://wordpress.org/plugins/lux-vimeo-shortcode/