These are the requirements:

• Audio (listening): speaker or headset
• Browser: last version of Edge or Chrome
• OS: Windows (higher than Windows 7), Mac, Linux (with limitations only → not recommended)
• Bandwidth: Download min. 2 MBit/s - Upload min. 512 KBit/s → the higher the bandwidth, the better the audio/video quality

You don’t need to install anything. No admin rights required.