VLC Media Player is a software from Video Lan Organization, you can read its policy on the website: https://www.videolan.org/privacy.html
VLC Media Player is a multi-platform, open-source media player distributed under the GPL license that lets you play virtually all of today’s most popular video and audio formats.
It supports MPEG, DivX, WMV, AVI, MOV, MP4, MKV, H.264/AVC, FLV, MP3 and OGG among many other codecs and container formats, as well as Blu-rays, DVDs, CDs, and different streaming protocols. Plus, if you have any corrupted or half downloaded files, it can read incomplete video and audio files. It also supports different types of subtitle formats, such as SRT, ASS or native files extracted from discs, and can be customized in style, size, and screen layout.
If the app’s interface seems too simple, you can modify it by using skins. VLC Media Player can also be controlled through the command line, telnet or a web browser, so its features go beyond a simple media player.