Not a balloon, that text never rotates. No way a balloon doesn't rotate. My bet is on CGI, too many times the UAP movements are anticipated by the pilot.
I've seen balloons move in a weird way like this without spinning (not for so long). Not saying it couldn't be CGI tho. There's one point in the video when the symbols/numbers appear to be jutting out, but I figured that might be evidence of CGI.
Here it looks kinda like the symbols are sticking out and the object looks edited in against the background to me:
But here you can see that the symbols are flat:
As others have said, it seems like the camera predicts movement a little too well, and YouTube comments claim the uploader is a 3D effects artist.
I'd suggest the pilot isn't anticipating the object's movements, but their own. Looks to me like they're moving the drone around a relatively small are the object is moving in.
Some are pointing out it looks like the text for "Om", others claiming numbers. It's clearly not the best angle to determine what is written on it. Also, symbols on UAP have been reported before.
Keep in mind that UAP doesn't mean extraterrestrial or that we can't find answers for what it is. Discussions like this are for speculation and to see if anyone has clear answers.
Yeah, it's a bit of a Rorschach test at the moment. The compression and/or focus makes it tricky depending on where people are pausing the video. I could see it potentially being a number.