You cannot output signal from your DVD player to your laptop via HDMI. Your laptop's HDMI port is for output only.  I'm not aware of a way to do it via HDMI-to-USB, either, other than by connecting intermediate hardware such as a video capture card. If you want to play DVDs to your laptop, your easiest solution is via an external USB-connected DVD drive. Many are compact, lightweight and inexpensive.
Hello,  I am trying to connect my DVD player to my laptop screen. The output from the DVD player is HDMI. Is it possible to use the Latitude 5480/5488 HDMI port or c port to bring in the DVD player's broadcast? Thank you for your help,  Andrew
DVD Player to Laptop