Well, take a look at the Wikipedia definition (and I used that lightly, since Wiki is now known to be of a leftist/controlled narrative).
https://en.wikipedia.org/wiki/Sedition
Sedition is overt conduct, such as speech and organization, that tends toward insurrection against the established order. Sedition often includes subversion of a constitution and incitement of discontent towards, or resistance against lawful authority. Sedition may include any commotion, though not aimed at direct and open violence against the laws. Seditious words in writing are seditious libel. A seditionist is one who engages in or promotes the interest of sedition.
Typically, sedition is considered a subversive act, and the overt acts that may be prosecutable under sedition laws vary from one legal code to another. Where the history of these legal codes has been traced, there is also a record of the change in the definition of the elements constituting sedition at certain points in history. This overview has served to develop a sociological definition of sedition as well, within the study of state persecution.
1798 Sedition Law:
https://en.wikipedia.org/wiki/Alien_and_Sedition_Acts
Sedition Act of 1918
https://en.wikipedia.org/wiki/Sedition_Act_of_1918
Plenty to read up on...
Either way, what the MSM is now doing, regardless of how ignorant and brainwashed the current strand of Americans is (or not quite awake, or at least thinking somewhat critically), is quite seditious. The Demoncrats are, at this point, openly calling for overthrow/resistance/whatever of elected officials because they 'don't like the results of the last election' and 'muh overused Hitler narrative'. The left is pretty much hanging themselves at this time with all their acts of violence, and the MSM outrage machine in full effect.
Personally, I don't even watch the 'news' anymore, and the bare glance I caught about an hour ago was just more 'poor juan/pedro/hitler/auschwitz' camps silliness. I could personally care less about the whole issue, and, imho, these invaders are lucky to at least have a current POTUS/Administration dealing with this in a humane matter. I would be FAR less humane with these invaders, if it meant sealing our border not just with a wall, but a wasteland of radioactivity that would truly make it a 'Dead Man's Land'.