Although I’ve used the Pi since 2012 I’ve only recently used it as a media player. I had a spare Pi so decided to stick it behind the TV, connect it with HDMI and hook it up to my video and MP3 collection.
Many years ago I used an original Xbox running XBMC. For playing media from a network this was an unbeatable combination. It played everything. Then HD content became more common and I retired the Xbox. The XBMC project spread its wings and was renamed Kodi and now supports a range of platforms including Windows, Linux, Amazon Firesticks, Android boxes and the Raspberry Pi.