It happens but pretty much only to countries in Africa that really cannot pay their debt and are in a "debt vicegrip" as it is translated to my language.
Obviously when you make debt to access more funds, you should pay it back. Else why would anybody loan you money if you are not good for it right? Countries don't borrow money the same way you borrow money to your friends for a night out. "oh, i got you next time" .
In regards to the tpoic, it is not like the US will explode tomorrow because of debt but it is pretty serious in % to the GDP + the US has a very high deficit (and rising still I think?), highest in a long time (if ever?). So the situation is not turning around.
And then there are other economic monitors like the job market, import/export difference etc. with which people try to predict the future. And they also do not point in the right direction. And this then leads to less investments and higher prices for government loans or as they say "bonds".
So this entire economic picture is showing a bad economic forecast. Not some whole the US can never come out of but something that needs to be addressed. for sure by a good solid economic plan (that hopefully also still leaves room for social policies since there is more to life then money right?).
Didn't watch the video though so just summarizing what I got on info.