diff --git a/demo.ipynb b/demo.ipynb
index f908f22e2..c3b407928 100644
--- a/demo.ipynb
+++ b/demo.ipynb
@@ -73,6 +73,7 @@
         "from IPython.display import HTML, Javascript\n",
         "from skimage import img_as_ubyte\n",
         "warnings.filterwarnings(\"ignore\")\n",
+        "os.makedirs(\"user\", exist_ok=True)\n",
         "\n",
         "display(HTML(\"\"\"\n",
         "<style>\n",
@@ -442,13 +443,15 @@
         "\tfor name, file_info in upload_input_video_button.value.items():\n",
         "\t\tcontent = file_info['content']\n",
         "\tif content is not None:\n",
-        "\t\tselected_video = content\n",
-        "\t\tpreview = resize(PIL.Image.fromarray(thumbnail(selected_video)).convert(\"RGB\"))\n",
+        "\t\tselected_video = 'user/' + name\n",
+        "\t\tpreview = resize(PIL.Image.fromarray(thumbnail(content)).convert(\"RGB\"))\n",
         "\t\tinput_video_widget.clear_output(wait=True)\n",
         "\t\twith input_video_widget:\n",
         "\t\t\tdisplay(preview)\n",
         "\t\tinput_video_widget.add_class('uploaded')\n",
         "\t\tdisplay(Javascript('deselectVideos()'))\n",
+        "\t\twith open(selected_video, 'wb') as video:\n",
+        "\t\t\tvideo.write(content)\n",
         "upload_input_video_button.observe(upload_video, names='value')\n",
         "\n",
         "def change_model(change):\n",
@@ -480,7 +483,7 @@
         "\t\trelative=relative.value,\n",
         "\t\tadapt_movement_scale=adapt_movement_scale.value\n",
         "\t)\n",
-        "\tif selected_video == 'demo/videos/0.mp4':\n",
+        "\tif selected_video.startswith('user/') or selected_video == 'demo/videos/0.mp4':\n",
         "\t\timageio.mimsave('temp.mp4', [img_as_ubyte(frame) for frame in predictions], fps=fps)\n",
         "\t\tFFmpeg(inputs={'temp.mp4': None, selected_video: None}, outputs={'output.mp4': '-c copy -y'}).run()\n",
         "\telse:\n",
@@ -490,7 +493,7 @@
         "\twith output_widget:\n",
         "\t\tdisplay(HTML('<video id=\"left\" controls src=\"data:video/mp4;base64,%s\" />' % b64encode(open('output.mp4', 'rb').read()).decode()))\n",
         "\twith comparison_widget:\n",
-        "\t\tdisplay(HTML('<video id=\"right\" src=\"data:video/mp4;base64,%s\" />' % b64encode(open(selected_video, 'rb').read() if type(selected_video) is str else selected_video).decode()))\n",
+        "\t\tdisplay(HTML('<video id=\"right\" muted src=\"data:video/mp4;base64,%s\" />' % b64encode(open(selected_video, 'rb').read()).decode()))\n",
         "\tdisplay(Javascript(\"\"\"\n",
         "\t(function(left, right) {\n",
         "\t\tleft.addEventListener(\"play\", function() {\n",