TAG/TRAUM has released a sneak preview, below, for a planned Tangerine Dream documentary:

https://www.youtube.com/watch?v=eBpYtALSZH8

Producers plan to fund the documentary via a Kickstarter project.

They plan for the crowdfunding project to go live May 1, 2016, but the project site is available now, and they are encouraging feedback and input for the project via the site.