1. Select your video clip on youtube.

2. On the right hand side of the window find the field headed: Embed

3. Select the code in this field and copy it.

4. Go to your wiki page.

5. Select Edit.

6. Select Embed Widget.

7. Select Video.

8. Select YouTube. and paste the code into the field below number 4.

I will add screen shots later :o) If anyone wants to do it let me know, and I will give you access.