These URLs have a Path that always starts with "/watch" so no need for a
pattern. Also, everything after the "?" is considered the "Query String",
not the Path. Anything after a "#" is the "Feature String". The path
matching in IntentFilters only see the Path, and nothing from the "Query
String" or "Feature String".
these are the available kinds of URLs:
https://developer.apple.com/library/ios/featuredarticles/iPhoneURLScheme_Reference/YouTubeLinks/YouTubeLinks.html
Each <data> elements applies to the whole IntentFilter, so there is no need
to declare the host, scheme, etc. multiple times within a single
IntentFilter.
Also, pathPrefix="/" will match all paths, so it is unnecessary.
This makes the app fully exit, and removes it from the Recent Apps listing
with the goal of hiding whatever the user was currently watching, and/or
searching for.
PanicKit provides a common framework for creating "panic button" apps that
can trigger actions in "panic responder" apps. In this case, the response
is to lock the app, if it has been configured to do so
https://dev.guardianproject.info/projects/panic/wiki
