When embedding or linking to a Youtube video, you have lots of parameters you can put in the URL. Those are influencing the player’s behavior and view. This is very useful, especially on embedding directly into your website or blog.
Playback with a seek
One of the most unknown and rarely used parameters is the playback with a seek. Let’s say, you want to show a video and the important moment your want to point to is at 1 minute and 28 seconds. Did you know, than you can directly jump into that position? Simply add #t=1m27s behind the video URL like this:
Video starts playing at 1 min and 28 secs.
This is very cool when sharing videos via twitter or instant messengers and you do not want your participant to watch the whole story.
Other options
There are a lot of other values like setting borders, enable related video recommendations, HD playback and some more which you will find on Googles API page. Have a look at it and I am sure, there is something useful for you.