Pierre, did you not see the mention of Blender??? It is GREAT for doing video. Yes, you do have to learn it but you want to do a good job right?? One thing to note. It is best in blender to turn the movie into a series of stills in the openEXR format. It is also important to go into settings and increase the buffer memory so that you get a much faster response as it loads much more movie at one time. Make sure to render the firm into its own director or you will have a LOT of picture files cluttering some other directory! Also more Ram mean better responsiveness and having a SSD drive is also a GREAT benefit. I would think this is true of any system.
Open Shot is a video editor for Linux operating system written Python. It is open source video editing software and also freely available. It main features to support many audio, video and image formats. Better drag and drop feature. In open shot cutting, trimming, snapping and cropping are easier. It also supports video transition, compositing, 3d effects and motion picture credits. Open shot is user friendly software that gives also support of animation of key frame, easier encoding of video, digital zooming, editing and mixing of audio and digital video effects. This video editor software provides compositing and mainly extensive editing tool for practical working on high-definition video with HDV and AVCHD.

I have a small favor to ask. More people are reading the nixCraft. Many of you block advertising which is your right, and advertising revenues are not sufficient to cover my operating costs. So you can see why I need to ask for your help. The nixCraft takes a lot of my time and hard work to produce. If everyone who reads nixCraft, who likes it, helps fund it, my future would be more secure. You can donate as little as $1 to support nixCraft:

Content Samurai promises that you can “Create Stunning Videos Fast” with their app. You can use Content Samurai video creation software to turn articles, blog posts and shorter pieces of content into videos in minutes, or so the creators claim. I’ve spent a lot of money having freelancers create videos for me, so I figured I would give Content Samurai a shot.