1. Choose a folder where Ant Video downloader will reside. This can be a folder on your desktop or in your account's home directory, for example C:\Users\
2. Download .zip file into a temporary folder
2. Extract contents of .zip file into Ant Video downloader folder defined in step 1
3. Open Chrome menu — More tools — Extensions
4. Select checkbox Developer mode
5. Click on Load unpacked extension button
6. Select folder where you extracted contents of .zip file and click OK
Note: Do not delete Ant Video downloader folder defined in step 1, otherwise the extension will not be loaded.