Supposedly CM13 doesn't include the correct version of WebView. Installing it from the google play store might fix this issue: https://play.google.com/store/apps/details?id=com.google.android.webview&hl=en
/u/tributeswithcum /u/Aleks192 /u/gahrlaag
From what I was able to find this is an issue that is related to CM13 + Relay for Reddit.
Can you play the video on following page? http://videojs.com/
Here is another post related to CM13 + Relay + video issues https://www.reddit.com/r/cyanogenmod/comments/4yw2wi/problem_with_web_video_playback_in_cm13/
/u/tributeswithcum /u/Aleks192
Does the image load for you? https://i.eroshare.com/f9gdg2ua.jpg
I suspect there are issues with the SSL-certificate and your OS/browser version.
It would be worth a try to install Chrome Beta: https://play.google.com/store/apps/details?id=com.chrome.beta&hl=de