Cannot switch on Videos of the particiants in webinars, they can´t, too, button can not be pressed

Hello,

A Zoom Webinar is different than  a Zoom meeting.

In a Zoom Webinar only host or a panelist, can share their screen, video, and audio in a webinar.

Attendees can not share video unless promoted to panelist. The attendees can use the chat or question and answer options to interact with the host and panelists if the host allows this.

Please read this Zoom support article for more details;

https://support.zoom.us/hc/en-us/articles/115005474943-Meeting-and-Webinar-Comparison 

Regards

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@Oskar_DELI'm sorry I misunderstood your question. During the course of a webinar you can allow individual attendees to talk (hover over the attendee's name and click "Allow to talk") or you can promote an attendee to the panelist role and they will be able to talk and turn on their video.  https://support.zoom.us/hc/en-us/articles/115004834466-Managing-attendees-and-panelists-in-a-webinar#h_f2488f66-cc47-478f-85bf-cc5339b7fb71

This is useful if you want to have spoken questions from attendees or if a panelist accidentally joins the webinar using the attendee link.