The fix to resolve all this: Add your Elgato capturing software to your Discord Game Activity. Discord Settings > Game Activity > Add it! FULLSCREEN your Elgato software. (very imporant) Start your stream in a discord call or voice channel. Now you have working VIDEO and AUDIO! Have fun =) Archived post. More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.