Recently, I have been listening to a lot more NF, and sometimes watching the music videos that go with them. I've noticed that in some of his videos, including The Search, Real, Why, and various others, he is pictured holding, or near a bunch of black balloons. Why have these balloons been put into many NF videos, do they stand for something? Do they represent something from his childhood?
While there isn't any official information on this, in many of NF's recent videos there is a trend of these black balloons being present.
As evident by the tone and lyrics used, the contrast between the black clothing and items against the lighter colors used by the other individuals (see: The Search) can be used to describe mood, state of mind and health.
Adam McDonald (2019) suggests:
The black balloons resemble his burdens, that follow him around attached to his cart.
Further reading/analysis on the topic: