No solution, but I found some interesting issues. Hopefully, this info will be of value to the developer.
I initially tried to upload two separate videos via the uploader tool, as I wanted to make certain that there wasn’t an issue with the first video. I made several attempts with each, all of which stalled and failed.
Next, I logged into my YouTube account to manually upload the videos. I found numerous copies of each video, each showing a failed upload. So, the uploader tool is connecting with YouTube, yet something is causing it to fail.
Yes, it’s broken in FF as well. I upgraded the plugin via the upgrade page in the admin area of my site. There it’s listed as compatible with 3.3.1.
