I'm following below instructions
Chromium 34 and later cannot detect flash plugin
But in some Youtube videos I got The adobe flash player is required for video playback and some website show the same error.
I've installed latest update of Chromium and Ubuntu and Flash player.
I run sudo apt-get install pepperflashplugin-nonfree then sudo update-pepperflashplugin-nonfree --install (after I run it, have no echo), Then I run sudo update-pepperflashplugin-nonfree --status (No answer again), additionally When I go to chrome://plugins