After a recent Ubuntu update Youtube has tinted the sky orange and people blue. This article will help resolve this issue.
If you do not have the directory “/etc/adobe” use the following command in the terminal
sudo mkdir /etc/adobe/
I like to use the terminal text editor but you can use what ever one you like.
sudo nano /etc/adobe/mms.cfg
Add the following lines
Press CTRL+X and enter to save the file.
When you restart your browser the issue will be resolved.