Kaltura CE installation on ubuntu

Please provide the full output of the APT commands so we can understand why there’s an attempt to remove the Percona packages and install the ones from the official repo.
The script, as you can see, does not request any MySQL packages directly. The only MySQL related package the Kaltura debs require is the MySQL PHP extensions. These in turn, rely on the MySQL client package which Percona provides. Like I said, I suspect you have left over MySQL debs from the Ubuntu repo, which is what causing the issue.