Enumerates Google Ads sub format types.

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

| Enums ||
|---|---|
| ## `INSTREAM_NON_SKIPPABLE_MAX30_SEC` | Non-skippable instream YouTube ad with a duration up to 30.99 seconds. |
| ## `INSTREAM_NON_SKIPPABLE_MAX60_SEC` | Non-skippable instream YouTube ad with a duration between 31 and 60 seconds. |
| ## `INSTREAM_NON_SKIPPABLE_STANDARD` | Standard length non-skippable instream YouTube ad. |
| ## `UNKNOWN` | Unknown. |
| ## `UNSEGMENTED` | Category for formats that are not further split into sub formats. |
| ## `UNSPECIFIED` | Not specified. |