Update documentation to reflect additional error info

XCDYouTubeKit/XCDYouTubeClient.h

@@ -117,7 +117,7 @@ NS_ASSUME_NONNULL_BEGIN
  *  @param video  The `<XCDYouTubeVideo>` object that this operation will query. Passing a `nil` video will throw an `NSInvalidArgumentException` exception.
  *  @param cookies  An array of `NSHTTPCookie` objects, can be nil. These cookies can be used for certain videos that require a login.
  *  @param completionHandler A block to execute when the client finishes the operation. The completion handler is executed on the main thread. If the completion handler is nil, this method throws an exception.
- *  @discussion If the query operation completes successfully (i.e. at least one URL stream is reachable), the `streamURLs` parameter of the completion handler block contains a `NSDictionary` object, and the error parameter is nil. If the operation fails, the `streamURLs` parameter is nil and the error parameter contains information about the failure. The error's domain is always `XCDYouTubeVideoErrorDomain`. The `streamErrors` does not indicate that the operation failed but can contain detailed information on why a specific stream failed.In addition,  this parameter is dictionary of `NSError` objects. The keys are the YouTube [itag](https://en.wikipedia.org/wiki/YouTube#Quality_and_formats) values as `NSNumber` objects.
+ *  @discussion If the query operation completes successfully (i.e. at least one URL stream is reachable), the `streamURLs` parameter of the completion handler block contains a `NSDictionary` object, and the error parameter is nil. If the operation fails, the `streamURLs` parameter is nil and the error parameter contains information about the failure. The error's domain is always `XCDYouTubeVideoErrorDomain`. The `streamErrors` does not indicate that the operation failed but can contain detailed information on why a specific stream failed.In addition, this parameter is dictionary of `NSError` objects. The keys are the YouTube [itag](https://en.wikipedia.org/wiki/YouTube#Quality_and_formats) values as `NSNumber` objects. In some cases the errors within this dictionary may contain `NSError` objects with the code `NSURLErrorNetworkConnectionLost`—this may indicate that the file stored on YouTube's server is incomplete—furthermore, the error will make this suggestion via the`NSLocalizedRecoverySuggestionErrorKey` key of the error's `userInfo`.
  *
  *  @see XCDYouTubeVideoQueryOperation
  *

XCDYouTubeKit/XCDYouTubeVideoQueryOperation.h

@@ -44,7 +44,7 @@ NS_ASSUME_NONNULL_BEGIN
 /// Returns an error of the `XCDYouTubeVideoErrorDomain` domain if the operation failed or nil if it succeeded. The operation will only return an error if no stream URL is reachable (error code: `XCDYouTubeErrorNoStreamAvailable`). Also, this returns `nil` if the operation is not yet finished or if it was canceled.
 @property (atomic, readonly, nullable) NSError *error;
 
-/// A dictionary of `NSError` objects. The keys are the YouTube [itag](https://en.wikipedia.org/wiki/YouTube#Quality_and_formats) values as `NSNumber` objects. Use this property to query why a specific stream was unavailable.
+/// A dictionary of `NSError` objects. The keys are the YouTube [itag](https://en.wikipedia.org/wiki/YouTube#Quality_and_formats) values as `NSNumber` objects. Use this property to query why a specific stream was unavailable. In some cases the errors within this dictionary may contain `NSError` objects with the code `NSURLErrorNetworkConnectionLost`—this may indicate that the file stored on YouTube's server is incomplete—furthermore, the error will make this suggestion via the`NSLocalizedRecoverySuggestionErrorKey` key of the error's `userInfo`.
 #if __has_feature(objc_generics)
 @property (atomic, readonly, nullable) NSDictionary<id, NSError *> *streamErrors;
 #else