Some laptop computers come with a Blu-Ray DVD player built in.
My HP did way back in 2007. I can use an HDMI cable from it to input HD movies from the laptop into any modern flat screen TV that will play high definition content from a Blu-Ray DVD player. We can also view Blu-Ray movies directly on the laptop's 17 inch 16:9 aspect ratio screen. We can do this in the RV and also pipe stereo sound from the laptop's Blu-Ray DVD player into the RV's built-in coach speaker system. The laptop can be powered directly from any 12 volt outlet in the RV ... no inverter required.