You are downloading the AV Cast AppXBundle file v2015.729.1837.1704 for Windows Phone. AV Cast is a free and useful Music app: Cast your media to any Google Cast™ device! AV Cast is the free solution for making use of your Chromecast. Easily cast all compatible ... You can now download the offline AppXBundle file to install & try it.
Download Locations for AV Cast 2015.729.1837.1704 AppXBundle file
Note: To install it manually from an SD card, you should choose one of the server location above to get the offline AV Cast AppXBundle file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.