Below are the most reliable and widely used players you can download to play FLV files on Windows or mobile devices: (Most Recommended)
VLC is a free, open-source, and cross-platform player that can handle almost any video format, including FLV, without requiring additional codecs. 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
You can download it directly from the Official VideoLAN Website or find it in the Microsoft Store . 2. PotPlayer and subtitle synchronization.
Support for 8K resolution, multi-track audio, and subtitle synchronization.