Greg has a DVD/VCR combo, but it only plays in black and white. Leo says that the likely culprit is a bad composite cable (red, white, yellow). So he should replace that. They're pretty cheap. ScooterX in the chatroom says that in the memo of the DVD player, there's a setting that could be affecting it. The TV may be using the same jacks for component as it does for composite. He should check his menu settings. TomsGuide has information on how to do that.
Rick wants to know how he can bring his Amazon Fire Stick with him when he travels and plug it into the TV where he stays. Leo says that older TVs will require an HDMI to Composite converter, but newer TVs have HDMI ports. So he could just plug them in. Many hotel Wi-Fi hotspots require captive portal registration to use it, and the signal really isn't that good. Also some older TVs may not be HDCP compliant.