To report a bug with CS50 Video, email bugs@cs50.net. Be sure to mention:

• the URL of this page;
• the bug's symptoms; and
• exactly what you clicked or did to induce those symptoms.

That feature requires a browser that supports H.264 video, which yours doesn't! But you can use either of these browsers instead!

• Google Chrome, for Linux, Mac OS, and Windows
• Safari, for Mac OS and Windows