Installing the downloaded files is quite simple.
After you download the extension from http://www.hdflvplayer.net/magento-hd-flash-video-player/hd-flv-player-features.php follow the below
Steps to install this module on your Magento website.
1. Open the downloaded package, in which you can view two folders such as step 1 & step 2.
2. Open the folder “step 1”. Copy & replace the folders app, media & skin on your
root folder without removing the existing folders/files on your magento website.
3. Open the folder “step 2”. Copy & replace the folder layout & template on your
theme folder. It path will be like
There you go! The module is installed perfect now!