⚠️ This is a developer dedicated place. If you are a user and need help with Video DownloadHelper and/or its companion app:

• you can find all relevant links here.
• if you have an issue with the CoApp not being registered, read this.
• all the documentation is here.
• you can ask questions here.

DownloadHelper CoApp

DownloadHelper CoApp is a multi-platform (Windows, Mac, Linux) application providing the Video DownloadHelper browser add-on with a set of extra features not available directly from the add-on:

• file writing API
• launching default video player application on a data file
• a build of the ffmpeg video converter

DownloadHelper CoApp complies with the native messaging protocol and is not intended to be used directly from the command line.

Installer executables for the various platforms are available from the releases page.

Note about the registration process

After the app is installed, the coapp installs a json file into browser-specific directories, as described by the Mozilla, Google and Microsoft documentation:

• https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/Native_manifests
• https://developer.chrome.com/docs/extensions/mv3/nativeMessaging/#native-messaging-host-location
• https://learn.microsoft.com/en-us/microsoft-edge/extensions-chromium/developer-guide/native-messaging?tabs=v3%2Cwindows

You can see the list of files installed by running vdhcoapp install. Those files can be remove with vdhcoapp uninstall.