If you are using Chrome, make sure your Zoom is set to 100% and it should display the complete video. If you set it to 110% then you should also see the video controls when you mouse over the video. It is also possible that your computer screen resolution may affect the display. It's best to set the text size and resolution to the 'Recommended' or 'Default' setting according to your specific hardware and operating system.
You may want to try a different browser. Firefox did not seem to have this same issue.