VLC for Android 2.5 comes after the version 2.0 that has been around for over a year. Its list of changes is very long and it includes features like 360-degree video support, custom equalizer presets, picture-in-picture mode in Android O, audio boost in the video player, and more.
https://www.notebookcheck.net/VLC-for-Android-gets-the-first-update-in-a-year.256134.0.html