Not much of a problem. Film is grainy and difficult to see things clearly. *IF* Arbery threw the hammer, the video guy and at least the younger McMichael will probably say so.
FBI might be able to improve the video sufficiently to see more detail. We'll have to wait and see.
Could be an amazing coincidence that the hammer just happened to be lying in the road along which Arbery was running. Might have no significance at all.
There is also the inconvenient fact that the owner of the construction site says nothing was taken
Won't mean anything until the actual construction workers all claim the same thing. Owner lives in a different city, and probably doesn't even know if a hammer and boots were taken because they probably wouldn't be his anyways.
I also think the owner is restricting his statement to just the day of this incident. Clearly there has been previous problems with thefts at this site, and this is why he installed a camera that would alert him.
Owner is just trying to protect his own @$$.
DL: Film is grainy and difficult to see things clearly.
Also DL: The video clearly shows his footwear, a hammer, and the lineage of the hammer.