[skrebbel]

VLC Media Player. It's not pretty, but it has a play button and a scrollbar. Its 3629394 power user features are nicely stashed away where they belong: in a menu that most people never even bother to check out.

But the core feature for a video player is that it plays the damn video. That's core UX, and most other players of the last 15 years have dropped plenty balls there. You can have so many skins and library features and preview screenshots but if the movie doesn't play without your nerd cousin first breaking your OS with sleazy half-broken codec packs, the UX is shit.

The most difficult part for non-tech people using VLC is understanding Finder or Explorer to double-click the movie they just torrented.