Without access to the videos is difficult to troubleshoot, specially when some DRM is involved.
If you are using a 64bit system, you could try the development build of Chrome browser, which comes with PepperFlash. I hate to recommend that, but who knows...
Anyway, please attach the firefox-report.txt file generated in your desktop after running the commands below:
Code:
echo 'Ubuntu Architecture' > ~/Desktop/firefox-report.txt
echo '' >> ~/Desktop/firefox-report.txt
uname -a >> ~/Desktop/firefox-report.txt
echo '' >> ~/Desktop/firefox-report.txt
echo 'Ubuntu Version' >> ~/Desktop/firefox-report.txt
echo '' >> ~/Desktop/firefox-report.txt
cat /etc/lsb-release >> ~/Desktop/firefox-report.txt
echo '' >> ~/Desktop/firefox-report.txt
echo 'Firefox Packages' >> ~/Desktop/firefox-report.txt
echo '' >> ~/Desktop/firefox-report.txt
dpkg --get-selections | grep 'firefox*' >> ~/Desktop/firefox-report.txt
echo '' >> ~/Desktop/firefox-report.txt
echo 'Firefox binaries' >> ~/Desktop/firefox-report.txt
echo '' >> ~/Desktop/firefox-report.txt
which firefox >> ~/Desktop/firefox-report.txt
file /usr/bin/firefox >> ~/Desktop/firefox-report.txt
file /usr/local/bin/firefox >> ~/Desktop/firefox-report.txt
file /opt/firefox/firefox >> ~/Desktop/firefox-report.txt
echo '' >> ~/Desktop/firefox-report.txt
echo 'Firefox divertion' >> ~/Desktop/firefox-report.txt
echo '' >> ~/Desktop/firefox-report.txt
file /usr/bin/firefox.ubuntu >> ~/Desktop/firefox-report.txt
echo '' >> ~/Desktop/firefox-report.txt
echo 'Sources' >> ~/Desktop/firefox-report.txt
echo '' >> ~/Desktop/firefox-report.txt
ls /etc/apt/sources.list.d >> ~/Desktop/firefox-report.txt
echo '' >> ~/Desktop/firefox-report.txt
echo 'Flash packages' >> ~/Desktop/firefox-report.txt
echo '' >> ~/Desktop/firefox-report.txt
dpkg --get-selections | grep 'flash*' >> ~/Desktop/firefox-report.txt
echo '' >> ~/Desktop/firefox-report.txt
echo 'Plugin locations' >> ~/Desktop/firefox-report.txt
echo '' >> ~/Desktop/firefox-report.txt
locate libflashplayer.so >> ~/Desktop/firefox-report.txt
echo '' >> ~/Desktop/firefox-report.txt
locate flashplugin-alternative.so >> ~/Desktop/firefox-report.txt
echo '' >> ~/Desktop/firefox-report.txt
echo 'Flash symlinks' >> ~/Desktop/firefox-report.txt
echo '' >> ~/Desktop/firefox-report.txt
file /usr/lib/firefox-addons/plugins/libflashplayer.so >> ~/Desktop/firefox-report.txt
file /usr/lib/mozilla/plugins/flashplugin-alternative.so >> ~/Desktop/firefox-report.txt
file /etc/alternatives/mozilla-flashplugin >> ~/Desktop/firefox-report.txt
file /var/lib/flashplugin-installer/npwrapper.libflashplayer.so >> ~/Desktop/firefox-report.txt
echo '' >> ~/Desktop/firefox-report.txt
echo 'pluginreg.dat' >> ~/Desktop/firefox-report.txt
echo '' >> ~/Desktop/firefox-report.txt
cat ~/.mozilla/firefox/**/pluginreg.dat >> ~/Desktop/firefox-report.txt
firefox ~/Desktop/firefox-report.txt
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