Clues to the Cold Moon Scimitar

"Where is the video you took from the casino?"Randy Ling asked after a little thought.
He felt slightly relieved when he heard that Ye Ji had been taken away by Zhongtiansi's people.
No matter who the new person transferred to Zhongtiansi is, since he can sit in that position, he is definitely not an ordinary person, and he should not be able to solve the case based on just a video.
Moreover, even if Zhong Tiansi really wanted to deal with Ye Ji, he would definitely inform me in advance.
Because...