User blog comment:DaNASCAT/Technical Update: October 19, 2015/@comment-4551144-20151020022326

The video thumbnails are getting glitched as we add videos. The thumbnail was correctly rendered as it was supposed to earlier, but now it's all messed up and they will not render the video thumbnail for those videos uploaded on youtube. Tried in all browsers to get past it, but none will work. That bug is subject to be fixed.