Source Link : https://mykodiaddons.com/install-strictly-hd-kodi/
Launch Kodi
Press SYSTEM then File Manager
Press Add Source
Press None
Type https://github.com/LuciferOnKodi/repository.lucifer and Press Done
Enter a name for media Source, type lucifer & Press OK
Go back to Home Screen
Press SYSTEM
Press Add-Ons
Press Install from zip file
Press lucifer
Press repository.lucifer-x.x.x.zip
Wait for Add-on enabled notification
Press Install from Repository
Press Lucifer’s Repository
Press Video add-ons
Press Strictly HD
Press Install
Wait until you see Strictly HD Add-on installed message
Strictly HD is now installed and ready to use.