Snapchat video calling is a bit different from other applications. It is not a simple video call where a person has an option to accept or reject a call. As Snapchat provided a video calling option, they were a bit creative in this regard as well. When someone sends you a video call request on Snapchat, there are three options to choose from. The first is "Watch", by which you can see the other person calling you but the caller cannot see you. The second option is "Join", by which both of you can join and talk. If you tap on the camera icon in green, there will be a one-way video of yours.