Kanye West‘s bitter lawsuit against his touring insurance company is nastier than anyone knows — because he’s terrified secret footage of his extreme mental breakdown last year could be leaked, destroying his marriage in the process, RadarOnline.com can confirm.

More than 20 hours of video was filmed in the days before the troubled rapper’s hospitalization last November, sources told Radar.

“You can see the deterioration of his condition and his mental breakdown,” an insider told In Touch of the tapes.
In the video, Radar can confirm, West, 40, comments, “This is all about me getting off drugs, bad drugs,” and mentions popping prescription painkillers.

The footage also contains “a multi-day meltdown that includes crying fits, violence, wild behavior and the effects of sleep deprivation,” the insider told In Touch, adding that the release of such sensitive, personal material could “destroy” his three-year marriage to Kardashian, 36.