Can the Android YouTube app display annotations?
Annotations are unfortunately not supported on Android at this time:

Notes

Annotations appear on standard YouTube players and embedded players.
Annotations do not appear on custom YouTube chromeless players.
Annotations do not appear in video playbacks taking place on mobile, tablet and TV devices.


Someone from Google has evidently acknowledged this feature request, but I don't believe there's any kind of timeline for its implementation (or official word that it, in fact, will be implemented).