When I'm working on a 1440x1080 project the Video Preview fails to resize itself and the content is all squished in. Is there a way to get the Video Preview to match the project? (I'm not using an external monitor)
Right click the preview window area, choose "Simulate Device Aspect" and that should take care of the problem.
Also, be using Preview/Auto, unless you're using a second monitor as a full screen device.