ELI5: Explain Like I'm 5

History of videotelephony

Okay, kiddo. You know how we can talk to people far away using phones or computers? Well, a long time ago, people thought about how cool it would be if they could talk to each other AND see each other at the same time, just like when we do a video call or use Facetime.

The first person to make it happen was a man named Alexander Graham Bell, who invented the telephone. In the 1920s, he also came up with an idea called the "photophone," which could send sound waves through light. This was a hopeful step towards video telephony, but it wasn't quite there yet.

In the 1930s and 40s, some inventors made "videophones" that were big and clunky and not very practical. They were expensive and unreliable, and most people didn't want to use them. Plus, the technology just wasn't good enough to make a clear, real-time video call.

Fast forward to the 1960s and 70s, and things started to get better. There were new ways of transmitting video and sound signals, and engineers improved the cameras and screens that made video calling possible. Companies like Bell Labs, AT&T, and Sony worked on creating the first practical video telephony systems.

In 1971, AT&T introduced a video phone called the Picturephone, which was expensive and not very popular. But it paved the way for others to keep improving the technology. By the 1980s and 90s, video calling was becoming more common in business and government, but it was still too expensive for most people to use at home.

Finally, in the 2000s, thanks to the internet and faster data connections, video calling became accessible and affordable for ordinary people. Companies like Skype, FaceTime, and Zoom made it easy for people to make video calls from their phones, tablets or computers using internet connection.

So there you have it, buddy. Over time, technology and hard work made it possible for us to see and talk to people far away, which is pretty amazing if you ask me!