Sean “Diddy” Combs shared a video to Instagram apologizing for his actions after 2016 surveillance footage of the music producer physically abusing ex Cassie Ventura went viral. “It’s so difficult to reflect on the darkest times in your life, but sometimes you got to do that,” he said in a clip posted on Sunday, May 19. “I was f—– up. I mean I hit rock bottom but I make no excuses.” “My behavior on that video is inexcusable,” he added. “I take full responsibility for my actions in that video. I’m disgusted.” “I was disgusted then when I did it and I’m disgusted now. I went and I sought out …