Stephen Rodrick Some things are best in small doses. Cheesecake and Ketamine come to mind. The more-is-not-necessarily-better conundrum confronts the creators of “Scream of My Blood: A Gogol Bordello Story,” a Vice News documentary about the punk folk band Gogol Bordello and Eugene Hütz, the band’s charismatic lead singer. Hütz also doubles as a Ukrainian activist/raconteur/resident deep thinker. He can be a lot. Audiences’ appreciation of the doc will depend on their patience with Hütz, a man whose intentions are good even if his volume is always set to 11. Directors Nate Pommer and Eric Weinrib have the difficult task of trying to explain a 24-year-old cult band in 99 minutes. It is very much an immigrant story. There’s an early shot of Hütz swaggering onstage with the band — a mélange of violinists, drummers and guitarists — and baptizing the audience with his beer.