Why is much of the media playing down the first failed coup attempt in American history ?

No convictions, and a seemingly unenthusiastic prosecutor.

Communism, Bolshevism, Marxism, the Democratic Socialists (1930s Germany), the Socialist Democrats (America today), and the media (all forms - including Hollywood where you see so many celebrities against Trump) are all interconnected to one central agenda - to create a one-world government.

Trump is one of the few world leaders who are trying to prevent this from happening.

The damage done by Obama is crystal clear - Obama was a Communist. He tried handing the reigns over to Hillary (a Marxist), but she fumbled. The coup against Trump has been the backlash for this.

And they're not through - they still follow the same agenda, but Trump has added a new threat - he's going to take down the Deep State. This has them scared, and they're willing to do everything they can to stop him.

The current "Coronavirus" scam is their latest attempt to take him down. As long as they can maintain the panic (with the media as their "typhoid mary"), the economy has suffered immensely. They're trying to undo everything Trump has built up since becoming president so that he'll lose credibility with his supporters.

The discussion of a permanent $2,000/month stimulus check has a lot of people on both sides of the aisle interested. This is a Democratic idea. If they can provide a steady income for everyone ("entitlements") then there will be no incentive to allow businesses to reopen - and there goes the economy down the drain.

People like the idea of getting free money and many will support the stimulus checks. But they don't realize that it comes with a heavy price tag. By the time reality hits them, it'll be too late.

The media is playing this coup down because the god who walks among us, was/is the one responsible for it.

the liberal mainstream media has been bought off by Hillary, Soros and the DNC. journalism is a lost profession. the fourth estate has completely abdicated its responsibility to the American people to report the story objectively, accurately and honestly. the corrupt media thinks we're all stupid and have to be told how and what to think, which is like they do. Now stories just have to fit the leftist narrative. if they don't, they're ignored. case in point, the video of Tara Reade's interview being quashed by CBS and the documentation at the University of Delaware where Biden is an alumnus and has enough friends on the Board to not give permission for their release. 

Assuming you're referring to impeachment, a process that follows the Constitution to a tee cannot properly be referred to as a coup.