如果你想表示 "a video of someone from Guangzhou speaking Engpsh," 你可以这样说:

"A video of a Guangzhou native speaking Engpsh" 或 "A video featuring a Guangzhou resident speaking Engpsh."

你也可以说 "A Guangzhou person speaking Engpsh in a video," 或者 "A video of someone from Guangzhou speaking Engpsh."

希望这对你有帮助!