A nice trick that I learned from Gizmodo. How do you skip ahead in a Youtube video without using your mouse on a computer? It is actually very simple.
To do the skip, simply press 1, 2,3 or 4 up to 9. 1 means 10% of video, 2 means 20% and etc. If you have not fully load a video, you will need to press pause for it to work.
I tried on Mozilla Firefox, Google Chrome and Internet Explorer 9 browsers. All working well on Youtube website. However, not all website works. You should try it yourself.