You are downloading the Roku APPX file v126.96.36.1997 for Windows Phone. Roku is a free and useful Entertainment app: The Roku app for Windows Phone 8.1 allows Roku users to control their Roku player over their home network. Features include: - Search for ... You can now download the offline APPX file to install & try it.
Download Locations for Roku 188.8.131.527 APPX file
Important Notice: Now Due To Unspecified Limitations, You Can Not Use The Offline APPX File To Install It Any More.
To try to install it manually from an SD card, you should choose one of the server location above to get the offline Roku APPX file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.