Where can I download iOS 8.4 Beta safely, and how do I install it? I've just seen a video on the new Music app in iOS 8.4 Beta. Now if possible I would like to try it, so I simply googled "iOS 8.4 Beta download". I was hoping to find it in some developer section of an Apple website, but only found it on third party websites.
Can I assume that the software is going to be safe, when downloading it from websites like Chip.de (which is usually a trustworthy source).
How would I go about installing the software, as there are normally updates in iTunes or on the iOS device itself?
iOS 8.4 is not an open beta, so you have to be registered Apple developer (99$ a year) to use beta software on your iOS device.

Also note that getting the software-package is not enough. You're devices UID has to be registered with apple so it will activate when you install the beta software.