Improve error message in BlinkClient.cs for content type

Updated the exception message in BlinkClient.cs to include the
actual content type received instead of the video.ManifestId
when the content type is not "video/mp4". This change provides
more relevant information about the failure.

Author: bvdcode

Sources/Blink/BlinkClient.cs

@@ -246,7 +246,7 @@ public async Task<byte[]> GetVideoAsync(BlinkVideoInfo video)
             string contentType = response.Content.Headers.ContentType?.MediaType ?? string.Empty;
             if (contentType != "video/mp4")
             {
-                throw new BlinkClientException($"Failed to get video {video.Id}, manifest {video.ManifestId} - {response.ReasonPhrase}");
+                throw new BlinkClientException($"Failed to get video {video.Id}, contentType {contentType} - {response.ReasonPhrase}");
             }
             return await response.Content.ReadAsByteArrayAsync();
         }