In this video you are going to see how to install cinelerra video editor on ubuntu.

Go to cinelerra.org site. Click on download.
Scroll little, click on download menu, click on packages. Click on the distro. Run the given commands (as per distro) on terminal.
Don’t forget to edit sources.list file.
copy the line & search it in file. Now copy this entire line and replace it with the first deb result.

Click on menu type Cin click on it to open

So this way you can download & install cinelerra