To their credit, WinAmp and QuickTime (or any other known video player) never rotated the zoom widget with the video rotation, the lower end of which was so small it was unusable at any scale, and the entirety of which was unusable at any non-normal rotation or reflection.
https://imgur.com/gallery/g0acV
That's right: the mouse target is the outlined region whose width (and thus usability) diminishes to zero towards one end. It's the most Fitts' Law Hostile user interface I've ever seen, AND it rotates sideways and upside down with the video, AND the mouse tracking doesn't work at all in 3 out of 4 rotations (or reflection), only when it's non-rotated and non-reflected: they didn't bother to transform the mouse event coordinates, just the video-resolution user interface drawing!
https://en.wikipedia.org/wiki/Fitts%27s_law
Don't even get me started about "interlaying" the user interface INTO the video, so it looks jaggy with unreadable text, instead of "overlaying" the user interface at full screen resolution. Just look at those blocky letters "VLC ZOOM HIDE", and the ferocious jaggies on the diminishing zoom slider curve!
It's not even worth fixing any of those particular bugs in the zoom interface, because the entire concept of "interlaying" the user interface into the video is fatally flawed.
All that code needs to be printed out and burned, and VLC's entire user interface needs to be completely rearchitected from scratch by designers who know and respect Fitts' Law, so it works consistently across all platforms at all resolutions and rotations (and doesn't suck, while they're at it).
But that's not what the VLC developers want to acknowledge or work on. They're more interested in supporting the latest fashionable Anime format.
https://www.videolan.org/vlc/releases/2.1.5.html
>FOR ANIME FANS
>New 6.1 downmixer to 5.1 and Stereo from MKV/Flac 6.1. Correct YUV->RGB color matrix in the OpenGL shaders. Improved MKV support for seeking, and resiliancy. Editions support in MKV. Better subtitles and metadata support from MKV. Various ASS subtitles improvements.
But nothing for us "usability fans".