JS for begginers stuck on MAC

I’ve just started the beginner’s course and every time the videos stuck after few seconds on Chrome.
In firefox it works well.
Already tried to delete cookies and cache and Incognito doesn’t work as well.
Anyone Knows why?
Thank you.

The most straight-forward way could be : uninsatall Chrome ; dowload the most updated installer for Chrome from Google and install Chrome again.

If your mac/pc is too old , the most updated installer may not be available for you.