A tool coming to the latest versions of video editing applications is support for seamless transitions. Picture a scene showing people at a beach, and suddenly the sky zooms in and your in Rome or Paris, but it looks like you're in the same place because the transition glued the two scenes together using the sky. There are plenty of other examples of seamless transition; this magnificent video shows a good selection of them, and is partly responsible for starting the trend.
Signal Private Messenger is one of the most popular privacy chat apps. It features end-to-end encryption for all messages, voice calls, and video chats between two Signal users. It focuses a lot on individual chats. There are group chat features, but it's mostly for personal use. This is one of the biggest differences between it and rival privacy chat app Telegram. Video calls worked fine in our testing so we have no trouble recommending them. It's a neat way to get some encrypted chats as well. The app is also completely free and open source. You can't really go wrong with it, but there are better video chat apps if you need group video chats.