@leocg I just found a recent forum post that is probably related. The post indicates that Opera for Linux doesn't play h.264 videos based on it being "proprietary" codec. This is odd because Vivaldi doesn't have any issues with these LinkedIn videos. Here is the url:

https://forums.opera.com/topic/34659/opera-linux-browser-h-264-support-through-x264-open-source-codec