# Document History for API Reference
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The following table describes the documentation for this release of AWS Elemental MediaPackage (MediaPackage).
+ **API version:** latest


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| Change | Description | Date | 
| --- | --- | --- | 
| New createdAt field | MediaPackage now provides the date and time the VOD asset, packaging configuration, and packaging group were created. | March 8, 2023 | 
| New approximateAssetCount field | MediaPackage now provides the approximate number of assets in a packaging group. | December 9, 2022 | 
| New includeIframeOnlyStream field | MediaPackage now supports I-frame only trick-play for DASH VOD workflows. | November 7, 2022 | 
| SPEKE Version 2.0 is now available for VOD | MediaPackage now supports SPEKE Version 2.0 with CMAF and DASH VOD workflows. | October 10, 2022 | 
| Add constant initialization vector (IV) | Added constant IV to a packaging configuration for HLS encryption. | August 21, 2019 | 
| New MediaPackage VOD release | Initial documentation for MediaPackage VOD. | May 17, 2019 |