Icaros 332 Final is a collection of lightweight, high quality, Windows Shell Extensions, which is capable of providing Windows Explorer thumbnails for essentially any video media filetype. Icaros can provide Windows Explorer thumbnails, for essentially any video media format supported by FFmpeg which includes popular filetypes such as: Mkv, Flv, Avi, Mp4, Mov, Rmvb, M2ts, Ogm etc. It is capable of thumbnailing just about any file by adding its extension(s) to the optional filetypes box and re-activating Icaros.
CLICK HERE to get in on the current Icaros development discussion.
*NEW* Shark's MediaInfo Tool v23.11 (64Bit only)
For clarity, I am using the versioning of the MediaInfo DLL as the release version number.
It can be used through the Send to menu, Drag n Drop to the Desktop shortcut or as a standalone software.
A portable version is also available with commandline instructions for shortcut creation and removal.

MetaFox 2.5 has updated support for HEVC and WEBM content! Metafox is a simple to use video file converter. The installer places a shortcut on your desktop. You drag n drop a file or even an entire folder onto the shortcut and it will create an MKV using the original audio/ video/ subtitles. (64bit only)
Builtin Codec Tools

64bit MPC-BE player. This is my prefered player
Click here to download this pre-configured player that supports Dolby Vision (DoVi), HLG, and HDR to SDR conversion along with passthrough support, out of the box. It supports Automatic HDR screen switching in Windows. This download contains MPC-BE Player compiled from GitHub version 1.6.10.98 and also the
MPC Video Renderer with the new DoVi support which is compiled from GitHub version 0.7.0.2160
If you prefer to use the 64bit MPC-HC player, a pre-configured player is available here.
GraphStudioNext allows you to load your media files into a graphical interface and show you the codecs being used to render them. It will show your every DirectShow codec, filter and post-processor
in-between you and your files.
MediaCoder is a universal media transcoding software actively developed and maintained since 2005. It puts together most cutting-edge audio/video technologies into an out-of-box transcoding
solution with a rich set of adjustable parameters which let you take full control of your transcoding.
MeGUI is the most comprehensive GUI based ISO MPEG-4 solution. It supports MPEG-4 ASP, MPEG-4 AVC,
AAC, MP2, MP3, Flac, Vorbis, AC3 audio and various
common containers support (MP4, MKV, AVI, M2TS).