"The giants threw the stones at the cavalry with great force in the middle of their charge." Wow! This is terrible.
First, "with great force": Is it the cavalry that has great force? If it was the giants throwing stones with great force then that's what it should say. "The giants threw the stones with great force ..." Now it could be the stones that have great force. "The giants, with great force, threw the stones at the cavalry ..." That's better.
Second, "in the middle of their charge": Whose charge? The giants or the cavalry? Let's suppose it's the cavalry.
"With great force, the giants threw the stones at the cavalry, who were in the midst of charging."
"beautifully in the tree" vs. "to the tree with alarm": The former contains an adverb and a prepositional phrase, the latter contains two prepositional phrases. Same with the other two. Apples and oranges.
It's the adverbs that have to be with the verbs:
The bird flew quickly to the branch to save it's life.
The runners ran hurriedly along the path.
And the prepositional phrases have to apply properly:
"The bird flew to the branch with alarm" Was it the bird or the branch that had the alarm? The bird? Then it would make more sense: "The bird flew with alarm to the branch ..." And is it the bird's life or the branch's that needed saving? "To save it's life, the bird flew ... to the branch" still ambiguous.
"The bird, to save it's life, flew with alarm to the branch."
Doesn't sound like a good video.