I can play YouTube videos OK using Firefox, but here is a link that won't play on my laptop:
http://ourworldtoday.zxq.net/shows/owt081312.html. It was suggested that I make sure Flash Player is installed, so I installed Flash Player but nothing changed.
When I click the little arrow button to start the video it disappears. The only thing left on the window is a button that says [backup], but the page it backs up to doesn't exist. The video plays on my XP desktop PC in Firefox but not on my Windows 7 Dell Studio 15 laptop in Firefox.
Windows 7 Professional, 64 bit, service pack 1, Dell Studio 15 laptop.