Portal may refer to:

Peter Hollens is an American pop singer-songwriter-producer. He has been heavily involved with a cappella music since 1999 when he co-founded (with Leo da Silva) the University of Oregon's award-winning a cappella group On The Rocks, known as the first official collegiate a cappella group in Oregon. On The Rocks began a tradition of excellence in a genre that was previously unheard of in the Northwest. Originally from Ashland, Oregon, Peter graduated from the University of Oregon with a Bachelor of Music in Vocal performance. Since his graduation from the U of O, he has become very involved with collegiate a cappella, including recording, producing & judging international a cappella competitions throughout the United States. In 2010, Peter was featured on NBC’s The Sing Off receiving acclaim from The Sing-Off judges Shawn Stockman, Nicole Scherzinger and Ben Folds for solo performances leading On the Rocks, one of America’s premier collegiate a cappella groups. Peter records and produces from his home studio in Eugene, Oregon and recently recorded for Sony and Epic Records. Peter is married to Evynne Hollens, founder of the a cappella group Divisi.

Joe Penna (born May 29, 1987 in São Paulo), known online as MysteryGuitarMan, is a Brazilian guitarist, animator, and filmmaker. He currently resides in Los Angeles, California.

Penna maintains a popular channel on YouTube by the name of MysteryGuitarMan. He usually uploads videos every Thursday.

In January 2011, he was the most subscribed in Brazil. As of May 2012 his channel has over 2.1 million subscribers, and his videos have been viewed over 315 million times.

On February 18, 2010, Penna started a second YouTube channel, jp, where he uploads his making-of videos and vlogs. Within 6 hours, it became the third most subscribed channel in Brazil.

In 2007, Penna received media coverage, including attention from DC Fox News, after his "The Puzzle" video was featured on the front page of YouTube.

In 2009, Penna was again seen on the front page of YouTube with his "Guitar: Impossible" video, which has been covered by De Wereld Draait Door, the highest-rated primetime show in the Netherlands. On December 6, 2009, Penna was featured on FM4, an Austrian national radio station. Shortly after uploaded, his "Guitar:Impossible" video was featured on the MSN.com front page.

Dan Trachtenberg is a filmmaker and video podcast host from the Philadelphia suburbs who currently resides in the Los Angeles metro area. He is one of the three hosts of The Totally Rad Show and a former co-host of Geekdrome. Both programs are hosted at Revision3. In addition to working on Internet shows, Trachtenberg is the writer/director of the 2003 short film Kickin' and the director of various television commercials and public service announcements.

Trachtenberg has directed commercials for Lexus, Nike, and Coca Cola. In April, 2008, he joined Tight Films, for which he collaborated with Matt Wolf on an alternate reality game for Hellboy II: The Golden Army."

He directed the internet show, "Ctrl+Alt+Chicken."

On August 23, 2011, Trachtenberg released the short film, Portal: No Escape. Based on the video game, Portal, the film drew more than one million views within its first day on YouTube.^{[citation needed]} Within two months, the number of viewers surpassed six million.^{[citation needed]}