The most effective way to evaluate your internet speed and ensure there are no current outages is by utilizing an online speed checker such as Fast.
For group video calls, a general guideline is to have a connection speed ranging from at least 3 to 10 Mbps.
You can improve your session's performance by switching off your camera or modifying the video quality settings. This can significantly alleviate potential issues caused by a less-than-optimal internet connection.