Jarrell Miller has apologized after his fight against Anthony Joshua was called off.
He said he "messed up" after a failed drugs test didn't allow him a licence for the bout.
Miller was supposed to meet British IBF, WBA and WBO heavyweight champion Joshua at Madison Square Garden on June 1.
In the video message, Miller said "there were a lot of ways to handle the situation, I handled it wrongly and I'm paying a price for it."

Abu Dhabi UFC Fight Night ends with Ankalaev fifth-round victory
Joshua bounces back to secure knockout win over Prenga
UFC 333 confirmed for Abu Dhabi in October
Norris takes Hungary pole as Mercedes domination ends
India win second T20 clash in Zimbabwe to take series
