I was in the valley with my family this week, by Happy Isles, and I thought, I wonder if we can get into the Merced River gauge webcam. :-)
It took two trips and a bunch of effort, but we did it. My son and I are on one side, my husband on the other. My daughter had given up on our quest and was relaxing back at Curry village.
Our family shot :-)
https://afsmoa.dreamhosters.com/MercedWebcam.jpg
(If you want to try this, know that the WebCam has two positions, I don't know exactly how often it rotates, and that the webpage despite saying it updates ever minute updates every 15 minutes)
The official webcam:
https://www.nps.gov/media/webcam/view.htm?id=81B46521-1DD8-B71B-0BB6424139EC91BE