I can't play any video at Dailymotion in Chromium web browser in Ubuntu 16.04. The warning says Whoops! Looks like we can't play this video in this browser. Also the videos from Facebook and Twitter are not being played -- there it says "couldn't load plug-in" / "The media could not be played". I have tried many solutions available on the web, but nothing is working.
Results of running sudo apt-get update and sudo apt-get install adobe-flashplugin
:~$ sudo apt-get update
Err:11 ppa.launchpad.net/skunk/pepper-flash/ubuntu xenial/main i386 Packages 404 Not Found
E: Failed to fetch ppa.launchpad.net/skunk/pepper-flash/ubuntu/dists/xenial/main/… 404 Not Found
E: Some index files failed to download. They have been ignored, or old ones used instead.
:~$ sudo apt-get install adobe-flashplugin
Reading package lists... Done
Building dependency tree
Reading state information... Done
adobe-flashplugin is already the newest version (1:20170411.1-0ubuntu0.16.10.1).
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded. 1 not fully installed or removed.
After this operation, 0 B of additional disk space will be used.
Do you want to continue? [Y/n] y
Setting up runit (2.1.2-3ubuntu1) ...
start: Unable to connect to Upstart:
Failed to connect to socket /com/ubuntu/upstart: Connection refused
dpkg: error processing package runit (--configure):
subprocess installed post-installation script returned error exit status 1
Errors were encountered while processing: runit
E: Sub-process /usr/bin/dpkg returned an error code (1)