Unfortunately there are few tutorials for Cinelerra GG, and still less in English. They are all listed in the "Learn" section of the forum, including those of Chipper videos. See also "How to":
https://www.cinelerra-gg.org/forum/forum-lern/ -- Cin mailing list [email protected] https://lists.cinelerra-gg.org/mailman/listinfo/cin
