Transparent Background Video Support?!

Hi Sara,

Correct, we support FLV files with alpha transparency in our Flash output and the Articulate Mobile player (all Storyline versions). The nature of those files doesn't allow for transparency to carry over to our HTML5 output.  To make sure your courses will still play if you've included them we'll re-encode those files during publishing for HTML5 output to an MP4.

Some users have asked about other file types with transparency:

• The MP4/H.264 file type does not support alpha channel (not specific to Articulate tools)
• A .webm video format is an option for transparency, but we don't support that based on their lack of browser support.  Essentially if you were using that file, it wouldn't work in IE, Safari(mobile or desktop) and have less than awesome results in Firefox. 

Hope that helps clarify!