diff --git a/mvw-dl.py b/mvw-dl.py
index 03a1704..77d24a5 100644
--- a/mvw-dl.py
+++ b/mvw-dl.py
@@ -568,6 +568,7 @@ def copy_url(
     max_quality_url = video_metadata["url"]
     filename = get_filename(section_name, config_obj, show, max_quality_url, shorthand_uuid)
     resume_header = {}
+    tmp_file_open_mode = "wb"
     tmp_file_size = 0
     tmp_path = os.path.join(tmp_dir, filename)
     dest_path = os.path.join(dest_dir, filename)
@@ -578,12 +579,14 @@ def copy_url(
         tmp_file_size = os.path.getsize(tmp_path)
         log.debug(f"{shorthand_uuid} Temporary file '{tmp_path}' exists likely from a previous incomplete "
                   f"download attempt, size is {humanize.naturalsize(tmp_file_size, binary=True)}. Resuming ...")
+        tmp_file_open_mode = "ab"
     try:
-        with open(tmp_path, "wb") as tmp_file:
+        with open(tmp_path, tmp_file_open_mode) as tmp_file:
             log.info(f"""{shorthand_uuid} Downloading "{show_name}" ...""")
             if tmp_file_size > 0:
                 resume_header = {"range": f"bytes={tmp_file_size}-"}
-            log.info(f"resume_header: {resume_header}")
+                log.debug(f"resume_header: {resume_header}")
+                size_downloaded_for_progress_tracking += tmp_file_size
             r = requests.get(max_quality_url, headers=resume_header, stream=True)
             for chunk in r.iter_content(32768):
                 size_downloaded_for_progress_tracking += len(chunk)