成员的完整列表，这些成员属于 com.netease.nimlib.sdk.v2.message.attachment.V2NIMMessageVideoAttachment,包括所有继承而来的类成员

getDuration()	com.netease.nimlib.sdk.v2.message.attachment.V2NIMMessageVideoAttachment
getExt()	com.netease.nimlib.sdk.v2.message.attachment.V2NIMMessageFileAttachment
getHeight()	com.netease.nimlib.sdk.v2.message.attachment.V2NIMMessageVideoAttachment
getMd5()	com.netease.nimlib.sdk.v2.message.attachment.V2NIMMessageFileAttachment
getName()	com.netease.nimlib.sdk.v2.message.attachment.V2NIMMessageFileAttachment
getPath()	com.netease.nimlib.sdk.v2.message.attachment.V2NIMMessageFileAttachment
getRaw()	com.netease.nimlib.sdk.v2.message.attachment.V2NIMMessageAttachment
getSceneName()	com.netease.nimlib.sdk.v2.message.attachment.V2NIMMessageFileAttachment
getSize()	com.netease.nimlib.sdk.v2.message.attachment.V2NIMMessageFileAttachment
getUploadState()	com.netease.nimlib.sdk.v2.message.attachment.V2NIMMessageFileAttachment
getUrl()	com.netease.nimlib.sdk.v2.message.attachment.V2NIMMessageFileAttachment
getWidth()	com.netease.nimlib.sdk.v2.message.attachment.V2NIMMessageVideoAttachment