OpenShot Video Editor is a free, open-source video editor for Linux. OpenShot can take your videos, photos, and music files and help you create the film you have always dreamed of. Easily add sub-titles, transitions, and effects, and then export your film to DVD, YouTube, Vimeo, Xbox 360, and many other common formats.
Openshot is non-linear video editor that offers pretty cool transitions and effects.
And yes, we know that its only an alternative for simple video editing but this is one of a must applications you should have in your linux.
There are also other video editors for linux that can also be used for heavy productions.
Installing from ppa (RECOMMENDED):
sudo add-apt-repository ppa:openshot.developers/ppa sudo apt-get update sudo apt-get install openshot openshot-doc