Making a video call with Sony Xperia:
1. First option, enter a phone number.
Select Options> Make video call.
2. To make a video call using a contact:
Select Menu> Contacts.
Select the contact with the navigation key.
Select Options> Make video call.
3. To change the video call:
Select Menu> Organizer> Video call.
If you want to switch camera, select Options> Switch camera.
To access more settings for video call, select Options.
That is all!