Well don't worry you can do that very easily just by changing few characters.
You will see 11 characters after v= that's Youtube's video ID, you can change it to what ever video you want.
&#t=4m25s After #t= is place to change. In this case we are trying to play the video to start from 4 minute and 25 seconds.
If you want to make hyperlink for website then use this code <a href="https://www.youtube.com/watch?v=OHRQ9XwIsnE&#t=4m25s">Living With Lions In Africa</a>
You can change the video ID for different video and change the time to make it start from the place you want.