Chrome only: Firefox users can already use the VidzBigger Greasemonkey script to tweak and customize popular video sharing sites like YouTube, and now the script has been ported as a full Google Chrome extension.

After installing the extension, you simply can browse to any YouTube, MetaCafe, or DailyMotion video to see the layout changes—everything on the page is rearranged to show the video in a bigger size, and it keeps the video in place while you scroll the page to view suggested videos, so you can keep watching while looking around.

The biggest set of features is hidden in the preferences menu, where you can change dozens of options including disabling auto-play, skipping warnings and advertisements, tweaking the layout further, or even enabling a set of download links so you can keep a copy of the video for later.