Blender pure video editor - overlay image with transparent areas I just want to edit a video I recorded with my camera and add a logo onto it. 

The logo is a PNG with transparent areas, and I want these areas to show the underlying video. 

Unfortunately, this answer doesn't help me, it simply doesn't seem to change anything. When I click "render animation", the video shown contains the logo without transparent areas but with the "chess" background instead.   

How do I do that?
Found it out.

When you add an image to the VSE (video sequence editor, where videos, audios, images, etc. appear as bars like a timeline), click the image bar with the right button. A properties panel will appear for that image, containing the filename and other information about it. 

Under the "Edit Strip" section of that panel, change the "Blend" combobox to "Over Drop". (Usually it starts with "cross"). 

That will make the image transparent areas actually transparent on the video.