The video has no sound. What do I have to do? When you open the video, a button with the inscription "Unmute" will immediately appear in the image. Please click this button once. If the button no longer appears, please refresh the page.(wurde automatisch übersetzt) Related articles I am taking a course for the first time. Is there anything I need to be aware of? Can I access the online courses later? Do I need to register to access the chat? What can I do about connection problems with Vimeo? Does it make sense to get your own gloves and a heart rate sensor?