How to make a logo cycle (or loop) on top of a clip in movie editing mode? I would like to create in the movie editing layout a cyclic moving logo over a video, for instance a spinning globe. 

I know how to make a static logo:


check the dimensions of the movie clip
create an empty image with same dimensions with transparent background in gimp, add a logo and export as png file. 
add movie clip and image with logo onto different channels in movie editing mode of Blender with the image being on top of the movie clip.
choose "back drop" in the properties window of the image to the right. 
expand the image to the length of the movie-clip


How to change the steps in order to achieve a cyclic moving logo ?
Seems like there is no option to make an image sequence loop in within the VSE.

A workaround is loading your image sequence in the compositor, making sure you have the cyclic option enabled:
(in this example is an image sequence of 11 frames with alpha channel)



Then add a Scene strip to the VSE, make it alpha over, and disable OpenGL preview in the Scene Preview/Render, so you get the image sequence from the compositor. The 11 frames will play repeatedly the duration of the scene strip.