firefox will not play flash video (embedded youtube)

[SF Basilix]

Binary package hint: firefox

this continues to happen quite often. I can sometimes play youtube videos, but lately (more often than not), they just won't play - especially embedded flash videos from youtube. For instance, this website:

www.rovio.com/index.php?page=angry-birds-walkthrough-videos

is a great example. I press play, but nothing happens.

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: firefox 3.6.8+build1+nobinonly-0ubuntu0.10.04.1
ProcVersionSignature: Ubuntu 2.6.32-24.39-generic 2.6.32.15+drm33.5
Uname: Linux 2.6.32-24-generic x86_64
Architecture: amd64
Date: Sun Aug 8 02:23:25 2010
FirefoxPackages:
 firefox 3.6.8+build1+nobinonly-0ubuntu0.10.04.1
 firefox-gnome-support 3.6.8+build1+nobinonly-0ubuntu0.10.04.1
 firefox-branding 3.6.8+build1+nobinonly-0ubuntu0.10.04.1
 abroswer N/A
 abrowser-branding N/A
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100429)
ProcEnviron:
 LANG=en_US.utf8
 SHELL=/bin/bash
SourcePackage: firefox

[SF Basilix (sf-basilix)]

This appears to be an issue with Firefox and the adobe flash player. Chromium in Ubuntu 10.04 (Lucid) installed with Synaptic Package Manager works like a champ.

[dcecchin (dcecchin-deactivatedaccount)]

I noticed this too and it's exactly like the post https://lists.ubuntu.com/archives/ubuntu-users/2010-May/218968.html I found disabling compiz-fusion fixed it and if you re-enable it you cannot click the stop button or any controls.

[dcecchin (dcecchin-deactivatedaccount)]

Also is this bug a duplicate of https://bugs.launchpad.net/ubuntu/+source/flashplugin-nonfree/+bug/471203 ? I've also tried creating new ~/.mozilla directory to make sure it wasn't any plugins causing it.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[livio (livio)]

After upgrade of ubuntu 11.04, youtube video wasn't work. Only black window

[bro (matthijsbro)]

I have this mainly with embedded youtube, on youtube.com they do play. They start in any case but video lags terribly while sound continues.

[bro (matthijsbro)]

And indeed in Firefox, nog Chrome.