Что за две ошибки выдаёт android studio?

Question

[Chesterfield25]

При компиляции приложения выдаёт две ошибки

Note: Some input files use or override a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
Note: C:\Users\Viktor\AndroidStudioProjects\FacebookVideoDownloader\app\src\main\java\com\buratinoapps\facebookvideodownloader\GalleryActivity.java uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.

Вторая ошибка

Cannot fit requested classes in a single dex file