YouTube Time-

If you'd like to quickly generate a new link to a YouTube video that specifies a particular starting point within the video, try YouTube Time. Just insert a link to a YouTube video on this website, then specify the time you'd like the video to start playing. A new link is then created for distribution to others that includes your selected start time.

TubeChop-

TubeChop allows you to easily "chop" or clip sections from any YouTube video, and then share it. To use, import a YouTube video link into the TubeChop. When the link is opened, the interface allows you to select the start and end times of the video. Press "Chop it", and a new video link will be generated which can then be shared.

YouTube XL-

If you are showing YouTube videos on a television, or even via projector in your classroom, YouTube XL offers a version of the YouTube website specially formatted for large screens.

Caption Tube-

An easy to use, web-based application, CaptionTube lets users add text captions to YouTube videos. Log in with a YouTube or Google account, import any YouTube video link, and then add text captions to the video using a time-based user interface. Your captions are then saved to a file that can be downloaded and uploaded to YouTube for immediate viewing alongside the video.