The "hottest" tip right now is that you the Media Feature Pack from a website like you could in older versions of Windows. It is now managed entirely as an Optional Feature within your settings. How to Install the Media Feature Pack
Without this pack, apps like Photos, Groove Music, Movies & TV, and even third-party software (Zoom, Discord, VLC in some configurations) may fail to play or record audio/video correctly.
If the feature does not appear in the menu, you can force the installation using with this command: dism /online /add-capability /capabilityname:Media.MediaFeaturePack~~~~0.0.1.0 .