Django keep getting 104 connection reset by peer caused by adding simple video, can't forward video

[Dominik Lech]

I asked the same question on stackoverflow here: https://stackoverflow.com/questions/56667516/django-keep-getting-104-connection-reset-by-peer-caused-by-adding-simple-video. 

I want to add video to my django template. When I add it, video is unforwardable (I can't skip this video to other point, I can just play it from start to the end). Excatly the same issue happens when I open link to video in new browser tab.

When I close/refresh this page console shows 104 connection reset by peer.