Kmplayer Portable [best]

: Since it doesn't use a standard installer, you typically update it by replacing the old folder with the latest version's files.

In an era where cloud streaming is dominant, there is still a massive need for a robust, local media player. Not every computer has the codecs required to play MKV, FLV, or 4K HEVC files, and installing heavy software on a work or public computer isn't always an option. kmplayer portable

Test by running it on a computer you don't own – if it asks for admin password, it's not truly portable. : Since it doesn't use a standard installer,