This is by far the most requested feature since Chrome has support for extensions: a port of Video DownloadHelper to Chrome.
The latest version of Video DownloadHelper for Chrome can be installed from
https://chrome.google.com/webstore/detail/video-downloadhelper/lmjnegcaeklhafolokijcfjliaokphfkIt comes with an important limitation: it is not possible to download videos from YouTube. This is not a technical restriction but due to the Chrome Web Store policy: Video DownloadHelper for Chrome could simply not exist if it had the ability to download videos from the Google platforms.
This is still a beta version and it needs your feedback. Thanks.