Im so sorry Munchy has a stroke, and wasn't going to be recoverable. My deepest sympathy. Its a hard but final gift to them. To ease their suffering. It's one ive had to make many times in my life with my beloved companions.
Hugs..we care..many of us know just how hard it is to loose our loves.
We aren't veterinarians here. Even if we had been able to view the video , we wouldn't be able to know.
Unfortunately a stroke....there isn't much or anything that can be done.
You had many wonderful years together. We always want more time always. 20-25 years is a common lifespan in an Amazon. Some individuals may live longer. In my research in veterinarian / zoo articles on retrospective lifespan study that was found to be the average. I hope that gives some comfort.
I'm so very sorry