Whirlpool Double Wall Oven Dead after Self Clean - Door Locked

Oven/Range/Cooktop Repair
1

I have seen the previous posts about the fuse..but our LOWER oven door is locked. How can I unlock to pull the unit out and replace fuse?

thanks so much

2

A video. The interesting part starts at 2:12

https://www.youtube.com/watch?v=XYeb9J09BVU