In order to organise a video meet, you have to be "connected" to another user.
You need to first message that person - and have them message back - to make a connection.
Once the connection is made, head to the "Video Meet" page under the "Connect" section in the main navigation sidebar. Select who you would like to schedule a video meet with. Choose a date, time and duration. The user will receive an email informing them of the video meet invite. You will also receive a confirmation email from them once they have agreed to the invite.