From this detailed guide, you can learn how to install MultiStreams Addon On Your Kodi.
MultiStreams is a Kodi video add-on for browsing and playing from multiple backends (including webshare.cz, Hellspy, FastShare), with TMDB integration, search and filters .
this installation guide applies to all compatible devices including Amazon Firestick, Fire TV, Android & iOS, Mac, Windows, Android TV, Android Boxes, etc.
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How To Install MultiStreams Kodi Addon.
No Source repo For MultiStreams Addon just a direct link.
First download repository.multistreams-1.0.22.zip From Here and save it at location where from you can easily access it
- Open Kodi
- Be sure to have the Unknown Source box checked as Kodi requires this before installing 3rd party add-ons.
- HOME Screen > Add-ons > Settings button 
> Add-ons > Enable Unknown Sources.
- From your Home Click Add-ons
- Click the Add-on Browser Icon
- Navigate to where you saved the ZIP file that you downloaded Select repository.multistreams-1.0.22.zip
- Wait for Add-On Enabled Notification
- Click Install from Repository
- Click MultiStreams Repository
- Click Video Add-Ons
- Click MultiStreams
- Click Install
- Wait till you can see the message Add-on installed pops up. That's it! You can now find you addon from main menu > Add-ons