VLC Local Video player as the name says helps you to play most of the video files.FLV video player as the name clearly explains allows you to play most of the video files (MP4, MKV, WEBM, OGG, MP3, H.264, flv) without any need to download third party softwares like VLC, Windows PLayer etc. This is very helpful for computers with low storage space/processing power.
Open in VLC video player add-on, opens stream-able video and audio links in VLC player. This way you can watch online-streams in the well-known VLC player. To send stream-able URL to VLC player, right-click over the video or audio link. If you have found a link that is not yet supported, please open a bug report in the discussion section of add-on's FAQs page.