- u -

• UNKNOWN : IExtensionProvider
• UNKNOWN_METADATA : IMetadataObserver
• USER_MEDIA_INFO_ENABLE_LOCAL_VIDEO : ILocalUserObserver
• USER_MEDIA_INFO_ENABLE_VIDEO : ILocalUserObserver
• USER_MEDIA_INFO_MUTE_AUDIO : ILocalUserObserver
• USER_MEDIA_INFO_MUTE_VIDEO : ILocalUserObserver
• USER_STREAMS_BITMASK_AUDIO : ILocalUserObserver
• USER_STREAMS_BITMASK_VIDEO_HIGH : ILocalUserObserver
• USER_STREAMS_BITMASK_VIDEO_LAYER_1 : ILocalUserObserver
• USER_STREAMS_BITMASK_VIDEO_LAYER_2 : ILocalUserObserver
• USER_STREAMS_BITMASK_VIDEO_LAYER_3 : ILocalUserObserver
• USER_STREAMS_BITMASK_VIDEO_LAYER_4 : ILocalUserObserver
• USER_STREAMS_BITMASK_VIDEO_LAYER_5 : ILocalUserObserver
• USER_STREAMS_BITMASK_VIDEO_LAYER_6 : ILocalUserObserver
• USER_STREAMS_BITMASK_VIDEO_LOW : ILocalUserObserver