Youtube playback bug: the video dosen't buffer at the start

Question

Hello, I'm having this weird problem for youtube videos which I've just encountered few days ago.
Basically, on normal occasions when you click the video you'll enter the page and video should immediately start playing as it buffers.
However, for some odd reason when I click the video it dosen't buffer and nothing happens as the video screen is black. I've tried seeking via seek bar however it won't buffer no matter what. After around 10 seconds the videos starts playing and it buffers normally.
Note that it dosen't happen for ALL of the videos. It happens for some videos and I can't really give you examples because once I experienced the bug and tried playing it again, the bug is gone.
I have not made any major changes recently so I can't really pinpoint the cause of this problem. It just happened out of nowhere without any warnings.
FYI:
- Windows 7 Ultimate 64bit
- Main browser: Firefox 21.0 (latest Ver.)
     > I've tried using other browsers such as IE and Chrome but the problem is still there
- Flash player: 11.7.700.224 (latest Ver.)
     > I've also tried downgrading to older version but the issue still persists
- GPU driver: I currently use Radeon and my driver is up to date (latest version)
- Internet speed: no problems so far
     > I really doubt speed is the issue here as the video dosen't even buffer at all
Overall, it isn't a big issue since the video starts playing normally after few seconds but it's kind of annoying as I need to wait 10 seconds to watch the video

Answer 1

Hello Rajeev,
I tested both on my computer (using the preview HTML5 output) and on a server.  I have currently got both a version with a skin and one without on the server.  In IE the video freezes on the first frame, in Firefox it shows a loading symbol - when viewing the video with a skin.  Without a skin they both work fine.
I have built it on Windows 7 using Captivate version 7.0.1.237 if that makes a difference.
I have just tested on Safari (which I didn't do before) on the Mac it doesn't work (it freezes the same way as IE) however, on the iPad it does work.
So, maybe that's the solution - it doesn't work on desktops but it will work on iPad.  It would be better if it worked on HTML5 as such, but iPad is most important so maybe that's fine.  I always test on the machine I build on first and then other devices once it works there - I never thought to test what seemed to be broken on the iPad. 
Did you just test on the device, or did it work on your computer when you tried it?
Thanks