We've been able to connect our phones and laptops to TV's on a few ships. Think I've seen where you can still do it on the Majestic. Going to try a Firestick on our next cruise as my wife can only take so much CNBC news. Would be nice to get local news. Have been able to use YouTube TV but you also need to use VPN. As for connecting it, the Royal Class ship Tv's are wall mounted and it's a tight fit to get HDMI cord attached. I bring a long cord that I can leave plugged in so only have to do it once. Your children will have no problem getting their arms behind the TV. When there's a will, there's a way. Do a search on how to connect and access HDMI menu.