I'm an old man of 70 this year.
I have stuck with this problem for a long time.
It confused me that I couldn't play DVD copy on my Apple TV.
I asked my child that they told me that I could use a software to deal with this.
They said the DRM removal software is available.
Though I have no idea what did they talk about.
My child said it worked better on high quality and speed.
I really need your help me lead me to do this.
Thank you.

KDE does not make software that removes DRM from DVDs. As such, this request is off-topic.

Sorry, we cannot help.

Valorie