Enum describing possible ad strength video aspect ratio requirements.

[Proto definition ![GitHub](https://developers.google.com/site-assets/logo-github.svg)](https://github.com/googleapis/googleapis/blob/master/google/ads/googleads/v26/enums/asset_coverage_video_aspect_ratio_requirement.proto)

| Enums ||
|---|---|
| ## `HORIZONTAL` | The video requires a horizontal aspect ratio. |
| ## `SQUARE` | The video requires a square aspect ratio. |
| ## `UNKNOWN` | The received value is not known in this version. |
| ## `UNSPECIFIED` | Not specified. |
| ## `VERTICAL` | The video requires a vertical aspect ratio. |