The National Music Publishers Association (NMPA) joined a lawsuit against Google’s YouTube, saying its songwriting members aren’t receiving proper compensation when their work appears on the video Web site.

It’s the ever-expanding lawsuit-in-progress, which started off with Viacom filing the original papers. Other lawsuits quickly followed, causing U.S. District Judge Louis L. Stanton to merge the legal proceedings into one big sue fest.

NMPA chief executive David Israelite said the music publishers’ group was “very concerned about YouTube’s approach to copyright.”

Meanwhile, two suspected copyright infringement perps could end up doing jail time for their actions in separate incidents.

A 19-year-old Arlington, Virginia, woman faces up to a year in jail and a fine that could reach $2,500 for recording about 20 seconds of a movie.

Jhannet Sejas used the video camera in her cell phone to record a few seconds of the motion picture “Transformers,” saying she wanted to give her little brother a taste of the flick.

However, the theater’s assistant manager saw her holding up the phone and called the police, which carted Sejas and her boyfriend off to the local hoosgow.

So far, Sejas’ cell phone has been confiscated and the Marymount University sophomore has been banned for life from the Regal Cinemas Ballston Common movie theaters.

But that’s wasn’t enough for the theater, which is a part of the nationwide Regal Entertainment Group chain of movie auditoriums. The theater wants to prosecute for movie piracy, a first for the Arlington County police department.

“They were the victim in this case, and they felt strongly enough about it,” said police spokesman John Lisle.

Then there’s the case of the French high school student who couldn’t wait for “Harry Potter and the Deathly Hallows” to be translated into his native tongue.

So he did it himself and posted the first three chapters on the Web. That’s when la merde frappe le ventilateur.

“The anti-counterfeiting police discovered the affair and contacted Ms.[J.K.] Rowling’s lawyer,” said a spokeswoman for the publisher handling the fantasy series’ French editions, according to Reuters.

Soon after, the posting police arrested the 16-year-old high school student. The official French language version of the novel is scheduled for release October 26.