It's the graduation time of year for many college and graduate school students. And, naturally, we've started to see lots of commencement-related videos popping up on the site. Last week, a video of Austin Whitney, a paralyzed UC Berkeley senior who was able to walk across the stage with the aid of an "exoskeleton," went viral, became one of the week's top trending clips, and drew over 300,000 views from around the world:



Graduation ceremonies can be long, but one of the big graduation day trends so far this year have been "commencement 2011 time-lapses" of which there are numerous iterations posted from Universities around the country. Here are 10:



(Use the arrows to navigate between videos or watch them all here.)

Today, the YouTube blog has more on the famous (and less famous) commencement speeches available for viewing on YouTube, but we wanted to see which ones had racked up the most views, and the list below, which features a number of big-name celebrities, is what we came up with:

(*Combined views. May take a moment to load in full.)