Videos inserted as WebObject don't start automatically with "?autoplay=1" on Chrome and Edge

Bonjour everyone.

I've posted a demo for last week E-learning challenge #460... Using the toggle buttons... The principle is simple: a relaxing YouTube video starts automatically when you use the toggle buttons. Problems were reported to me on Chrome and Edge after I posted this demo: the videos don't start and the play buttons aren't clickable. Not very relaxing! As far as I'm concerned, it works perfectly with Firefox.

The videos are not integrated into the module. I used Youtube videos inserted as web objects, following the procedure described here:

https://access.articulate.com/fr-FR/support/article/How-to-Add-YouTube-Videos-to-Articulate-Storyline-360-Courses  

(sorry, I can't find this page in English).

The web object address is https://www.youtube.com/embed/video_id?autoplay=1 where I replace “video_id” with the Youtube video ID, then “?autoplay=1” which automatically starts playback. OK for Firefox, not for Chrome and Edge.

So perhaps it's a question of browser settings refusing automatic launch of (possibly inappropriate) videos.    ????

But if it doesn't work automatically for all browsers, there's no point in suggesting the “?autoplay=1” procedure.

Have I made a mistake? Do you see a way to fix the problem? Or explain it to me? Thanks.

Here's the Review link: https://360.articulate.com/review/content/10a28fe8-9bba-4a5a-9eff-a5775cf03dc6/review

-3 screenshots (Firefox: the video has started and is running / Edge: still image and unclickable button / Chrome: idem

-The .story file (just below)

-The address of one of the Youtube videos to try for yourself: https://www.youtube.com/watch?v=Ux8xAuQBdkk

So far, I haven't found any answers in the other discussions, all of which are quite old.