Here's the snip of his statement from the video:
I’m not going to sit here and make any excuses. … What I did was inexcusable. I can only ask and pray that you forgive me. I hope that others can learn from my mistake. I intend to live my life so that I’m truly worthy of the term ‘role model.Chris Brown said he opted to maintain his silence at the request of his attorneys but said he did apologize to his former girlfriend Rihanna multiple times.
However, Chris Brown reaches out to his fans and viewers by acknowledging his regret and asking pardon for the offense by accepting full responsibility to what he did to Rihanna.
Anyway, below is the apology video publicly posted in Chris Brown's website.