via the The Official YouTube Channel of the White House
“On January 30, President Obama will answer your top-voted questions in a special post-State of the Union interview from the White House. To participate, visit www.youtube.com/whitehouse and submit your question. YouTube videos you submit will drive the interview and will be used to select a few lucky people to join a live Google+ Hangout with the President.
The deadline to submit is January 28 at midnight ET.
NOTE: The White House and President Obama will not review any of the questions submitted before the interview and will not know which questions will be asked.”