Ah, okay. so, you already have a Cable Connection and it works so far that You have Your Desktop visible.
But when You play a Video, it only plays on the Laptop. Here could be the Point of @jun-dee a Thing:
So, how did You have set up Your Monitors in the Display Settings?
Another Thing: When You look a Video in a Player, Browser or whatever, did You tried to move the Window with the Video to the side where Your TV stands?
Changing my display to Mirror worked on the TV. Changing my sound to HDMI worked on the TV but it wasn't very loud so I had to set maximum volume or over-amplification. Is there a way to get better sound control on the TV? Basically with my hdmi cable I have videos working on the TV without advertising! Thanks, Joel
Where did you set the max volume? On the TV or laptop. You can balance the volume between laptop and tv. Start with setting laptop volume at 50% and then adjust you TV volume. See what happens. If it's still low, increase laptop volume to 75% and so on. I think you'll be able to get your desired amplification by tweaking these two