Use a go-pro to help mitigate the vibrations. Hang one from the ROPS, facing forwards OR backwards. Attach it to the hood with a magnet or suction cup. Again, pointing forwards or backwards. Attach it to the FEL arm and you can get some B roll of yourself coming into view when you lift the FEL. Oh, just thought, it'd be kinda cool to attach it to the FEL lever pointing at yourself. Every time you reach for the lever your hand will come towards the camera, and when you move the lever it'll give a funky view.
Bottom line is it comes down to what you're trying to capture. If you're trying to get into some kind of "vlogging" videos, you'll need something that points back to you a lot. If you're just trying to document what's being done, you'll need to get the camera in a place that the tractor won't obstruct the view.
With go-pros, they have all sorts of mounts. The go-pro style mount with the double stick tape is hard to beat. only down side is the permanency of the double stick tape. You can probably stick one of those mounts to one of the heavy duty magnets you get from harbor freight - that'll take care of most mounting options on a tractor.
Definitely don't discount just mounting on a tripod.
I just remembered another cool thing... Don't forget to do time lapses. You can turn a 3 hour video of you discing a field into a 30 second time lapse. And you can use an egg/kitchen timer to add a little pizzazz to it, like this.
https://tinyurl.com/yge5nhqn
