This happened a lot with Zoom calls for my then-four-year-old daughter's classes too. All the kids hated it because they were looking at the picture of a friend

This happened a lot with Zoom calls for my then-four-year-old daughter's classes too. All the kids hated it because they were looking at the picture of a friend and talking to them, but the friend didn't know they were so they weren't listening to them, and they all got incredibly frustrated. As adults we can have the theoretical knowledge about how these things work, but it does cut out a lot of helpful cues. For me, I also think the slight audio / video lag is really difficult in a similar way. It makes conversational fluency really hard, such as when you can interject, or knowing when someone has finished. It means that conversations tend to become a series of monologues, and that's a really tedious way of having a conversation.