From this detailed guide, you can learn how to install OnePlay Addon On Your Kodi.
The OnePlay Kodi Addon lists video content in Brasilian language. Sections include TV Ao Vivo, Filmes, Séries, Desenhos, Animes, Novelas and more. If you are interested in Brasilian videos you should check out this neat tool.
this installation guide applies to all compatible devices including Amazon Firestick, Fire TV, Android & iOS, Mac, Windows, Android TV, Android Boxes, etc.
How To Install OnePlay Kodi Addon
- 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 Settings (cog icon top left)
- Click File Manager
- Click None
-Type in the following EXACTLY https://oneplayhd.com/oneplay
- Click OK
- Click back on your remote/keyboard
- Click Add-ons
- Click Install from Zip File
- Click oneplay
- Click One.repo-1.x.x.zip.
- Wait for Add-On Enabled Notification
- Click Install from Repository
- Click Repositorio oneplay
- Click Video Add-Ons
- Click OnePlay
- 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, enjoy.