Take a still of the footage before the hand appears.
Mask it with the size of the hand and put that over the original.
This will only work if the footage is stationary.
Please post a screenshot of the situation.
You can also see this Adobe help:
But my opinion is to use After Effects, there are many tutorials on how to delete objects or people.
Ok mask out the hand when its max in view.
copy/paste the mask path on the still.
Put that over your original footage.
Did Ann's solution work for you? If not, let us know and we'll keep troubleshooting!