IKEA DVD Storage
This was a part of the BESTÅ BURS line. Sorry I'm not home to open it up. I did find a picture on the net of one open and filled with DVDs. Like most people, my number of DVDs has greatly decreased and thus it's mostly empty.
The unit is solid and has a door that opens down. The back of the unit, like most IKEA units, is cardboard. In the bottom one, I have a plug at that level and cut a rectangle in the backing the same as the plug. This gives me an electrical outlet in there.
The PS3/PS4 controller chargers and a media server are located inside. Also, extra remotes are in there and the video games for said PS3/PS4.
You could do this as just a mantle over top, but of course would need to get a plug at that height.
Similarly, since it is mostly hidden, you could run a wire up from the plug behind the TV into a mantle over the TV.