Add model name to Download threads

common/src/main/java/ctbrec/recorder/download/hls/MergedFfmpegHlsDownload.java

@@ -84,6 +84,7 @@ public class MergedFfmpegHlsDownload extends AbstractHlsDownload {
     public void start() throws IOException {
         try {
             running = true;
+            Thread.currentThread().setName("Download " + model.getName());
             super.startTime = Instant.now();
             splitRecStartTime = ZonedDateTime.now();