I doubt whether this show can be viewed online outside of Australia.

Four Corners: Series 2023 Putin and the Presidents

The comment about Putin playing Trump like a violin was made by Eugene Robinson, from The Washington Post.

After a meeting between Putin and Trump in front of the media the cameras were sent away, and they met privately for two hours, with no aides present.

Robinson says, "Putin didn't need the KGB psychological profilers to hand him a dossier on how to play Donald Trump. He was able to read Trump. He had a very good understanding of how to flatter him. He knew how to play Trump like a violin."