When updating I get the error
W: The repository 'http://ppa.launchpad.net/mc3man/trusty-media/ubuntu xenial Release' does not have a Release file.
Here I find another statement on this error: How can I fix a 404 Error when using a PPA or updating my package lists?
But this recommends removing certain ppas and I'm not sure if I should do that since it might mean not getting the updates I need. Is this what I should do?