Thanks for the responses.
1) Yes the magazine is out of the gun, hammer down, & safety off.
2) I can not watch the video. My internet connection is too slow. (dial up at 26400 bps)
3) When the gun is dry fired, it gives every indication the hammer has fallen.
Be that as it may, I removed the grips, the plug underneath the mainspring housing "tunnel", and the crosspin at the base of the hammer strut (the one the manual says to be sure the strut does not end up behind). With this stuff out of the way, I was able to press on the hammer to see if it would move forward any. It would not. After this, I reassembled the pistol. It appears to function normally, just can not get the main spring housing to swing out of the pistol for field stripping.