Thanks for the review!

Sorry, but the size of the initial instruction screen is intentionally set to be the same size that you set the video overlay due to a technical limitation. The way that the extension works is by taking a screenshot of just the pixel the user selected every second. If the user selects a pixel on the main video that the video overlay covers during commercials, the screenshot would be taken of the overlay video and not the main video. I would recommend setting the video overlay location to the top or bottom to try to get it the biggest you can while still not covering the pixel you want to select.

Great idea for the shuffling option! I'll try to look in to that to see if it is something I can implement in my next update.