IndexError when trying to access Collection section

[victoralvesgomide]

Describe the bug
A Django IndexError page shows up whenever you try to click "Collection" button.

To reproduce the bug

1. Access https://jandig.app/ in your browser
2. Stay in the Jandig's home page OR
   Go to profile editing page OR
   Go to my stuff page
3. Click "Collection" button
4. Error page will show up

Expected behavior
Collection page shows up when you click "Collection" button, instead of error message.

Screenshots

Please, tell us which device/browser is used when finding the bug:

• OS: Windows 10 Pro
• Browser: Mozilla Firefox 82.0 (64-bit) AND
  Google Chrome 86.0.4240.111 (64 bits) AND
  Microsoft Edge 86.0.622.51 (64 bits)

[pablodiegoss]

Thanks for the report! This issue is related to the mp4 bug that has been fixed, however, it is not in production yet!

[victoralvesgomide]

I thought it could be related to #319 indeed, but since I was not sure, I decided to report the bug anyway lol