Cinelerra is the most advanced non-linear video editor and compositor for Linux. Cinelerra also includes a video compositing engine, allowing the user to perform common compositing operations such as keying and mattes. Cinelerra includes support for very high-fidelity audio and video: it processes audio using 64 bits of precision, and can work in both RGBA and YUVA color spaces, using floating-point and 16-bit integer representations, respectively. It is resolution and frame rate-independent, meaning that it can support video of any speed and size.
It supports high-definition video, Blu-Ray, 3D, tethered shooting, integration of video, audio, and still images, all the usual effects such as scrolling titles, pans, and fades, animations, speed changes, audio mixing, export to multiple formats and quality levels including YouTube and Vimeo, and tons more. It is under active development and has great community support. This may be the only video program you’ll ever need.
Trey has a good point, I don’t want to do much more than combine my video with a few transitions and a soundtrack. Kdenlive works fine for that. My biggest issue with Linux video editing is the lack of good transitions and simple drag and drop functionality. Also DVD menu creation is still really poor on Linux. But over the last four years it has gotten much better.

I usually edit short videos from my life like play with kids, travel and bike rides, and sometimes do software project demos and tutorials. I tried all major tools in linux for video editing. Blender seems to be the most feature rich and consistent. It allows me to handle 4k video on my oldish laptop. It always feels so good that I buy its future for 20-50 bucks time to time. See More
Content Samurai is an online video creator software (application) that helps you create fast, easy and professional-looking videos within minutes. It allows you to insert articles into the software and it automatically creates a good-looking video using the text from the article you inserted. It can also add great images, video backgrounds and even text to speech voices.