Puzzle

Question:

I am taken from a mine, and shut up in a wooden case, from which I am never released, and yet I am used by almost everybody. 


Answer
Pencil lead

How to download video on Youtube?

To download video on Youtube just visit this link:
 Click this link

Steps:

1. Copy the url of the youtube video.
2. Then, paste it on the space provided by the keepvid website.
3. After that, click download.
4. After clicking the download link, please choose the format of your video.