it is a Flash problem, not a Verizon problem.
Example: on my desktop PC with Firefox, most YouTube videos that are in Flash will not work period. I get a Flash Stopped error message. To view a video when that happens, I copy the link to the video and then use Chrome to watch the video.
I was using Dolphin but have switched to Opera and "so far" no problems.
Adobe is no longer supporting Flash with updates and it has security issues. The browser must have an internal addon that will support Flash Videos.