I did a very big mistake when i bought this script, i do regret now. The guys behind claim it is opensource, but what they give you as open source is a very old app they develop that will stuck, whatever you can do, it will stuck, there is no proper documentation and there is no support, they will play with your emotions and you will endup bu buying their commercial version and that's where serious problems start, nothing really works, all the addons don't work, look around and you will never see a success story of a site running clipbucket, for whatever help, they will make sure you pay some money, you will endup giving up to avoid stress and frustrations. PLEASE DO NOT EVEN TRY THIS SCRIPT. The guys behind are not honnest at ALL.
If you're looking for a free, open source video sharing script, you could take a look at https://videosharevod.com/ that installs as WP plugin https://wordpress.org/plugins/video-share-vod/ .