To tell, you need to add the watts, or amps, from each device to determine whether this inverter will work or not. At 1100 watts continuous and 2200 peak, you should be able to run LED or LCD TV's, the real question would be whether or not there is enough amps to run the DVD player. The 1100 watts equates to 9.17 amps. The owners manual should tell you the rating for each appliance. If you don't have the manuals, they usually can be found online.
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2016 Sunseeker 3050DS towing 2006 Hummer H3