FLIPGRID

Flipgrid is a platform that allows teacher and students to construct new videos about a topic. A teacher can ask a question about a topic and students can response to videos about the topic or discuss it.  In addition, students build and strengthen social learning skills by discussing.
This platform can be bad for shy people because they need to record selfie video or they do not want to attend any discussion topic because of this situation.  
On the other hand, Flipgrid is so enjoyable because you can discuss a topic anywhere and anytime with your friends. Also, you can add some gif to your video which is another way of fun.