She identified herself by name and said she is an Iraqi who lives in Ramadi. She and her husband left November 5 for Jordan, using fake passports.
"We waited in Iraq, and a white car picked us up," she said. "There was a driver and a passenger. We entered Jordan together."
"We rented an apartment," she said, adding that her husband taught her how to use her explosives belt.
Describing her target, she said, "There was a wedding ceremony in the hotel. There were women, men and children."
It was not immediately clear whom al-Rishawi was talking to in the video or exactly what had preceded it. Muasher: Calming public key.
Muasher told CNN that the confession was televised because "it is very important for the public to know exactly what happened. I think the public was a bit relieved also to know that there were no Jordanians involved."
He added, "Right now the important thing for us is to calm down our public. Our public has not been used to such attacks."
He denied that there was anything improper in airing her confession, and promised "she will go through a fair trial."
Jordanian authorities said the apartment al-Rishawi referred to has been searched.
Jordan's King Abdullah II announced the woman's arrest earlier in the day.
"Obviously, the tragedies that happened in Jordan have happened in many parts of the world, from Asia to Georgia to all Muslim Arab countries to Europe and America," he said at a news conference.
"This is a phenomenon that brings us closer together, because we know this is the only way that we will be able to overcome these extremists, is if we are united and one."