You have to:

• download ahcdn.php.txt and ahcdn_config.php.txt (links below) to /admin/cdn/ subfolder of KVS installation
• rename ahcdn.php.txt to ahcdn.php , ahcdn_config.php.txt to ahcdn_config.php
• fill with the proper data ahcdn_config.php

After that:

• In the control panel of the KVS go to http://example.com/admin/servers.php open Local Videos (might be another storage server, depends on which server the files were imported, usually Local Videos)
• Select Streaming type CDN
• CDN control script (*) write ahcdn.php
• Streaming key (*): does not matter , you can write any symbols
• URL (*) : replace example.com with cdn.example.com (actually you have to use domain which was added to CDN previously) to get http://cdn.example.com/contents/videos or using HTTPS https://cdn.example.com/contents/videos

Control script https://cp.ahcdn.com/cdn/kvs/ahcdn.php.txt

Config file template https://cp.ahcdn.com/cdn/kvs/ahcdn_config.php.txt