Many events use OLAT as a digital platform for all matters of the semester: mainly as a data storage but also as a communication forum or even as an examination platform. The use of OLAT varies from lecturer to lecturer. You will be informed by your lecturers how OLAT is used in their courses.

If you participate in an event digitally, this is usually done via ZOOM. Your lecturers will provide you with a link that you click at the beginning of the course. Usually it is the same link for a whole semester. Here you can find information on how to use ZOOM sensibly and profitably.
Factsheet ZOOM for students (German)

In hybrid mode, you must be able to attend the course, whether you are present in the room or online via ZOOM. The "owl", which is a 360-degree camera, microphone and loudspeaker, enables hybrid discussion in small groups. It is placed in the middle of the room and transmits the person speaking to ZOOM. Important when using the owl is an enhanced audio discipline: The speaker meeds to speak loud and clear, while those not speaking need to keep as quiet as possible, including rocking chairs, typing on a laptop or talking with their neighbours. On ZOOM, if you are not talking, please mute your microphone.

Many courses use SWITCHtube and either put a specially produced video online before the course or record the live course and make it available afterwards. The video files can be streamed via a link. It is not possible to download them, and it is prohibited to pass them on to third parties.