Go to https://uzh.meet.switch.ch/ or https://jitsi.math.uzh.ch
Choose a name for your meeting/lecture (e.g. MAT123)
Allow microphone:
Click "I am the host" and log in with your UZH shortname
Open the settings
Give yourself the name HOST
Check all boxes then press 'ok'
Click share screen icon (bottom left corner)
Choose whole screen or only one window. Click on the window, then click share
Share the link with your students (copy from URL bar)
On the right side you see a panel for each student. If you click on the three vertical dots, a menu opens where you can mute or kick out a student (there is no way to unmute a student, they must do that themselves)
Any student can press the hand button to ask for attention (raise hand)
You will see a popup notification and also a hand symbol on the panel of the student who raised their hand:
If your screen sharing disappears, click the rectangle in top right corner. Don't click in the middle of the rectangle but close to the border. (If you click in the middle you rename yourself)
Got to the URL given by the lecturer. (URL of the form http://uzh.meet.switch.ch/...)
You should immediately see the stream of the host/lecturer. If not, click on the participant named HOST on thre right side. (Hover over the participants to see their names)
Open settings
Change name