EventType(value)Describes the event that occurred.
Values: EVENT_TYPE_UNSPECIFIED (0): The event type is unspecified. CREATIVE_VIEW (1): First frame of creative ad viewed. START (2): Creative ad started. BREAK_START (3): Start of an ad break. BREAK_END (4): End of an ad break. IMPRESSION (5): Impression. FIRST_QUARTILE (6): First quartile progress. MIDPOINT (7): Midpoint progress. THIRD_QUARTILE (8): Third quartile progress. COMPLETE (9): Ad progress completed. PROGRESS (10): Specific progress event with an offset. MUTE (11): Player muted. UNMUTE (12): Player unmuted. PAUSE (13): Player paused. CLICK (14): Click event. CLICK_THROUGH (15): Click-through event. REWIND (16): Player rewinding. RESUME (17): Player resumed. ERROR (18): Error event. EXPAND (21): Ad expanded to a larger size. COLLAPSE (22): Ad collapsed to a smaller size. CLOSE (24): Non-linear ad closed. CLOSE_LINEAR (25): Linear ad closed. SKIP (26): Ad skipped. ACCEPT_INVITATION (27): Accept invitation event.