Enum describing the allowed maximum duration values for videos used in non-skippable video responsive ads.

[Proto definition ![GitHub](https://developers.google.com/site-assets/logo-github.svg)](https://github.com/googleapis/googleapis/blob/master/google/ads/googleads/v25/enums/non_skippable_max_duration.proto)

| Enums ||
|---|---|
| ## `MAX_DURATION_FIFTEEN_SECONDS` | Indicates that non-skippable ads must be at most 15 seconds long. |
| ## `MAX_DURATION_SIXTY_SECONDS` | Indicates that non-skippable ads must be at most 60 seconds long. |
| ## `MAX_DURATION_THIRTY_SECONDS` | Indicates that non-skippable ads must be at most 30 seconds long. |
| ## `UNKNOWN` | Used for return value only. Represents value unknown in this version. |
| ## `UNSPECIFIED` | Not specified. |