Give me an example of editorial of entertainment?

First, if you are asking about writing an editorial, that refers to the official opinion about a topic, coming from the editor of a newspaper or magazine, or the news director of a radio or TV station. An editorial about entertainment might get into some issue that the editor is concerned about: like whether the lyrics of songs today are having a negative effect on kids; or whether violent Video Games can be linked to violent behavior; or whether certain TV programs have too much sex or violence.

It doesn't even have to be a controversial topic. It can be a problem that you see in the entertainment industry: you could editorialize about the high cost of concert tickets, for example. So, choose an aspect of entertainment, state the issue you are raising, and then give your clear and well-reasoned opinion. Don't just rant: be factual, and give good reasons for why you feel [whatever] is a problem, and what you believe needs to be done to remedy it.