Zoom options are available at the bottom right before the comments sidebar. By default the video is set to ‘Auto Fit’
You can adjust video zoom between 25% and 400%. All comments and annotations can be seen in each zoom option which lets you get a close up view of exactly what changes have been requested. In addition to the zoom % you have the option to
Clicking the full screen button next to the video speed options takes the video into full screen mode. All comments and annotations remain hidden in full screen mode.