Can you hook a xbox up to a portable DVD player?

No, you cannot directly hook an Xbox up to a portable DVD player. An Xbox outputs video and audio through HDMI or AV cables, while a portable DVD player is designed to play DVDs and typically has its own screen. If you want to use a DVD player as a display for an Xbox, it would require specific video inputs that portable DVD players do not possess. Instead, consider using a dedicated monitor or TV for the best experience.