The power edge server is going to draw way more power just because it has a “powerful” cpu(s) and other power running components. The Qnap will be much quieter and consume maybe a few watts less power than your existing setup, potentially. I wouldn’t use it though because your existing setup is way more flexible on what you can do with it.
VLC is such an incredible tool, I use it just about everyday to do everything from just watching a video to recording streams . Don’t forget to donate in some way to your favorite apps. I know the VLC group could use some help to keep them going.