You mean like this?I just did a test run of removing the mirror and was able to get it out without breaking anything following the method in the video. The key is to get the pry tool deep inside and pry out on the plastic, not the rim of the glass (as Smoky alluded to above). I was tempted to just leave the glass out until my new turn signals come in but that could be a week or more. Once the first one or two clips come loose you are home free. Putting it back in was pretty easy and worked well.
For anyone attempting this it should be noted that the glass is larger than the plastic backing plate. Point being, the very rim of the mirror itself is just glass and the very outside rim should not be used to pry against. When I get the glass out again I'll try to remember to get a photo to show what I'm talking about.
Minus the capton tape.