No need to buy an expensive "outdoor" tv to use in the
cabin. You can replace a regular tv several times for what it cost for an outdoor rated one.
A better questions is what do you want to watch? Basically you have three sources: OTA programming with an
antenna, streaming (like Netflix), or recorded movies or shows (DVD etc.). With the first, it's all about the
antenna. For other than use in a slip, you need an amplified omni-direction antenna. For streaming, you need a good WiFi signal. A
cell phone as a hotspot will
work as long as you have a good plan with LOTS of data. For recorded material, there are more options today beyond DVDs like DVRs with hard disks or high capacity flash drives.