Below are the most reliable and widely used players you can download to play FLV files on Windows or mobile devices: (Most Recommended)
Support for 8K resolution, multi-track audio, and subtitle synchronization. skachat proigryvatel dlia flv failov
To play .flv files (Flash Video), you'll need a third-party media player since the default Windows Media Player typically does not support this format without extra codecs. Below are the most reliable and widely used