Snapchat acquired a video platform to do video chatting its own spontaneous way
In an interview with The Verge, Spiegel explained that he envisioned Snapchat's upcoming video chatting capabilities in the same vein as the app's messaging functionality, which strives to emulate the fluidity and spontaneity of everyday casual conversations. "The essence of conversation... is just someone wanting to talk to you." - he said, explaining why the app discards many traditional metaphors of messaging services, such as read receipts, typing indicators, statuses, envelope animations, and the like. Furthermore, when both users are inside a chat, they are able to tap and hold on a new blue button. The friend's face appears on the other side of the conversation. There's no ringing or answer call. It's like a friend of yours showing up on your doorway to talk. Furthermore, if users want to show their friends something, they can activate their device's rear camera and go with it.
The blue button in question is the new Here indicator - positioned next to the typing bar. It is designed to replace the typing status which is familiar from Skype. It works by showing up in the chat window when your friend's online, and sending a Push notification to your lock-screen if you are out of Snapchat, but someone has begun typing to you and wants to talk to you.