XYplorer Beta Club

audio (play) --- foobar
video (play) --- pot player

audio (edit) --- audition

audio (convert) --- foobar
video (convert) --- XMedia Recode

redundant

For most of my software, my philosophy is to search first open source and light releases (use few CPU, HDD space and RAM space), but when free or commercial software are really better I use it (like XYplorer ).

For audio player, I use XMPlay.
It's very light, read a lot of formats, has nice skins, allow a lot of customization and...
work with global shortcuts (may be controlled in background when ye are on other applications, so I use Ctrl+up to play/pause, Ctrl+Alt+Left for previous track, Ctrl+Alt+Rigth for next track...).

For video player, I use PotPlayer, MPC-HC and sometimes VLC.
PotPayer is not an open source software but I choose it because it offer a lot of customization, and mainly allow speed control without pitching sound thanks to X and C shortcuts.
VLC do it too, but is more complicated and less ergonomic.
MPC is very robust and work fine for 1× speed.

For simple video editing VirtualDub2 is a very good tool (allow to crop/join streams without recalculate it, but work as a classic video encoder too).
MKVToolnix and gMKVExtractGUI are great for cropping/joining videos and extract audio from files.
FFMpeg is better again, but only work as a cmd (no GUI).

Audio: foobar2000
Video: SMPLAYER (have used VLC a long time but changed to SMPLAYER because it had less problems playing my video files)

Spotify for music. (Which is exist as web app as well as desktop app.)

audio : i like 1by1 , it's a directory folder player.
video: MPC , potplayer .

MediaMonkey for audio & PotPlayer for video

MPC-HC64 for general files on the computer
J River Media Center 25 for video on TV and CD collection on computer
Xyplorer for audio samples (when I can get it to work successfully)
Audacity for editing/converting audio files (NCH switch for bulk convert)
VLC if everything else fails (only necessary if its some weird file type)

Audio: AIMP
Primary Video Player: Zoom player
Secondary Video Player: Gom player
Pot player and VLC as well but i rarely use them tbh.

Video : PotPlayer (before ads)
Sound: Audirvana (commercial)
Music Library Management : JRiver Media Player (commercial)
Image browsing: XYplorer with XnViewMP for fast editing (scripts)

for my music collection: MusicBee
Video: Media player classic