diff --git a/main.py b/main.py
index ebc8f36..b87da07 100644
--- a/main.py
+++ b/main.py
@@ -39,6 +39,7 @@
 
 import requests
 import json
+import tempfile
 
 # --- --- --- Section Init --- --- --- #
 # Login to RainClassroom
@@ -49,6 +50,10 @@
 DOWNLOAD_FOLDER = "data"
 CACHE_FOLDER = "cache"
 
+# Make a instance-specific cache folder
+TEMP_FOLDER = tempfile.mkdtemp()
+print(f"Temp Folder: {TEMP_FOLDER}")
+
 os.makedirs(DOWNLOAD_FOLDER, exist_ok=True)
 os.makedirs(CACHE_FOLDER, exist_ok=True)
 
@@ -217,6 +222,7 @@
 
     if os.path.exists(f"{DOWNLOAD_FOLDER}/{name_prefix}.mp4"):
         print(f"Skipping {name_prefix} - Video already present")
+        time.sleep(0.5)
         return
 
     has_error = False
@@ -233,15 +239,25 @@
     if not has_error and len(lesson_video_data['data']['live']) > 0:
         print(f"Concatenating {name_prefix}")
 
-        with open(f"{CACHE_FOLDER}/concat.txt", "w") as f:
+        ffmpeg_input_file = f"{TEMP_FOLDER}/concat.txt"
+
+        # Get absolute path of the video files
+        cache_absolute = os.path.abspath(f"{CACHE_FOLDER}")
+
+        with open(ffmpeg_input_file, "w") as f:
             f.write("\n".join(
-                [f"file '{name_prefix}-{i}.mp4'" for i in range(len(lesson_video_data['data']['live']))]
+                [f"file '{cache_absolute}/{name_prefix}-{i}.mp4'" for i in range(len(lesson_video_data['data']['live']))]
             ))
 
-        cmd = f"ffmpeg -f concat -safe 0 -hwaccel cuda -hwaccel_output_format cuda -i {CACHE_FOLDER}/concat.txt -c:v hevc_nvenc -b:v 200k -maxrate 400k -bufsize 3200k -r 8 -rc-lookahead 1024 -c:a copy -rematrix_maxval 1.0 -ac 1 '{DOWNLOAD_FOLDER}/{name_prefix}.mp4' -n"
+        cmd = f"ffmpeg -f concat -safe 0 -hwaccel cuda -hwaccel_output_format cuda -i {ffmpeg_input_file} -c:v hevc_nvenc -b:v 200k -maxrate 400k -bufsize 3200k -r 8 -rc-lookahead 1024 -c:a copy -rematrix_maxval 1.0 -ac 1 '{DOWNLOAD_FOLDER}/{name_prefix}.mp4' -n"
 
         print(cmd)
-        os.system(cmd)
+        ret = os.system(cmd)
+        if ret != 0:
+            if ret == 130:
+                raise KeyboardInterrupt("Interrupted")
+
+            raise Exception(f"Failed to concatenate {name_prefix}")
 
     if has_error:
         with open(f"{DOWNLOAD_FOLDER}/error.log", "a") as f:
@@ -272,6 +288,9 @@
     ret = os.system(
         f"aria2c -o '{CACHE_FOLDER}/{name_prefix}-{order}.mp4' -x 4 -s 4 '{url}' -c")
     if ret != 0:
+        if ret == 130:
+            raise KeyboardInterrupt("Interrupted")
+
         raise Exception(f"Failed to download {name_prefix}-{order}")
 
 # --- --- --- Section Download Lesson PPT --- --- --- #
@@ -438,13 +457,16 @@
     # If PDF is present, skip
     if os.path.exists(f"{DOWNLOAD_FOLDER}/{name_prefix}.pdf"):
         print(f"Skipping {name_prefix} - PDF already present")
+        time.sleep(0.5)
         return
 
     os.makedirs(f"{DOWNLOAD_FOLDER}/{name_prefix}", exist_ok=True)
 
     images = []
 
-    with open(f"{CACHE_FOLDER}/ppt_download.txt", "w") as f:
+    aria2_input_file = f"{TEMP_FOLDER}/ppt_download.txt"
+
+    with open(aria2_input_file, "w") as f:
         for slide in ppt_raw_data['data']['slides']:
             if not slide.get('cover'):
                 continue
@@ -459,7 +481,11 @@
         # with open(f"{DOWNLOAD_FOLDER}/{name_prefix}/{slide['index']}.jpg", "wb") as f:
         #     f.write(requests.get(slide['cover']).content)
 
-    os.system(f"aria2c -i {CACHE_FOLDER}/ppt_download.txt -x 16 -s 16 -c")
+    ret = os.system(f"aria2c -i {aria2_input_file} -x 16 -s 16 -c")
+    if ret != 0:
+        if ret == 7:
+            raise KeyboardInterrupt("Interrupted")
+        raise Exception(f"Failed to download {name_prefix}")
 
     from PIL import Image
 
@@ -513,6 +539,16 @@
 for course in courses:
     try:
         get_lesson_list(course)
+    except KeyboardInterrupt:
+        # Remove temp folder
+        print("Removing Temp Folder")
+        os.system(f"rm -rf {TEMP_FOLDER}")
+        print("Interrupted")
+        exit()
     except Exception as e:
         print(e)
         print(f"Failed to parse {course['name']}", file=sys.stderr)
+
+# Remove temp folder
+print("Removing Temp Folder")
+os.system(f"rm -rf {TEMP_FOLDER}")
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