***Deprecate**`videoLanguageManager.addLanguage` and `videoLanguageManager.deleteLanguage`: use `videoLanguageManager.addConstant` and `videoLanguageManager.deleteConstant` instead
***Deprecate**`videoCategoryManager.addLanguage` and `videoCategoryManager.deleteLanguage`: use `videoCategoryManager.addConstant` and `videoCategoryManager.deleteConstant` instead
***Deprecate**`videoLicenceManager.addLanguage` and `videoLicenceManager.deleteLanguage`: use `videoLicenceManager.addConstant` and `videoLicenceManager.deleteConstant` instead
* Introduce `.getConstantValue()`, `.getConstants()` and `.resetConstants()` for `videoLanguageManager`, `videoCategoryManager`, `videoLicenceManager`, `videoPrivacyManager` and `playlistPrivacyManager`
* Add server plugin hooks:
*`filter:api.overviews.videos.list.params` and `filter:api.overviews.videos.list.result`