"...?ecver=x..." parameter on the youtube embed URL

youtube, youtube-iframe-api

Solution

ecver=1 can be deleted. This is a forced display at the top of the video title, + watch later, + share.

Problem

I've Noticed when embedding Youtube videos the following 2 URLs achieve the same result: `https://www.youtube.com/embed/ML1AyQC2HKM?ecver=2&modestbranding=1&rel=0` `https://www.youtube.com/embed/kwdRYaBUco4?modestbranding=1&rel=0` embeded youtube video with parameter set What does the `ecver` parameter on the youtube embed URL set ? After checking The Documentation and searching the internet I couldn't seem to find anything to explain this parameter. The name would suggest its setting the Ecmascript version? but this is just a stab in the dark and i can't seem to find anything to confirm this.

Original source