Wake up to a video
Pick a clip from your own library. It plays full-screen behind the time and the buttons, and the screen turns to match the clip — portrait for a phone-shot video, landscape for 16:9. The clip's own soundtrack is the alarm.
Every video alarm still carries a tone underneath. If the file is gone, the decoder refuses it, or it freezes mid-alarm, the tone rings anyway. Waking to a video only counts if it always wakes you.
Picking a video to wake up to means picking the whole video.