DAVID BAUDER Associated Press Dave Grohl thought he was making a nostalgic film about the formative days of famous musicians. But then the pandemic happened. Partly by design and partly by circumstance, âWhat Drives Usâ became a surprisingly emotional documentary about the power of live music and the pain of its absence. The Foo Fighters leader has become an effective storyteller on film, making the âSound Cityâ documentary on a legendary California music studio and the HBO series âSonic Highways.â His latest is available for streaming through the Coda Collection, a subscription streaming service, and Amazon Prime Video outside the U.S.