When making his biographical documentary, country veteran Garth Brooks says he learned how to do it (or how not to do it) by watching a Whitney Houston doc.

“I love Whitney Houston, and when you see her documentary, a lot of the subtitles say ‘historian’ or ‘expert.’ But did they even know her?” he asked us at the Bowery Hotel launch party for his A&E doc “The Road I’m On.”

In it, “everybody they … talk to was standing right there the moment it happened.”

He also said that — in spite of the huge success his contemporary Billy Ray Cyrus has had recording “Old Town Road” with Lil Nas X — he won’t be making a hip-hop track. “Oh, no. For one, I am not cool,” he said. “I am the squarest guy on the planet.”

Part one of the two-part “The Road I’m On” premieres on Dec. 2 on A&E.