Patsy Cline: American Masters (2017)
Featuring women inspired by Cline, PBS created a great documentary detailing the singer's legacy for Women's History Month and what would have been her 85th birthday. If you happen to catch it, watch it.
The Real Patsy Cline (2004)
This short documentary features rare live performances.
Sweet Dreams (1985)
This slightly fictionalized biopic starring Jessica Lange came in the aftermath of the exceedingly successful film about Loretta Lynn, Coal Miner's Daughter—which also includes a great Patsy Cline portrayal.