Your best bet is to bring a regular 10' HDMI cable (plus any laptop adapter/converter ... 6' cable might be too short; and hook up direct to the side HDMI input source on the HDTV monitor in your stateroom. Or, playback directly from the laptop if screen is reasonably sized ... 15" plus) coupled with a bluetooth speaker for better sound.

A mini-suite on the Gem, like other ships, is simply an oversized balcony, nothing special ... DVD players are becoming obsolete these days. Full suite/Haven guests have access to a free collection of about 60 PPV videos of fairly recent times - not for mini's, however.
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