Multiple animations on a video

[eplougonven]

I'd like to make a video appear and automatically play, seems simple enough. Automatically playing is apparently considered an animation, because it appears in the animation pane.
Now if I add another animation to the video, it removes the previous one!
Here's what I do: I insert the video and add the "appear" animation, which ... well, appears in the list in the animation pane. I then go the playback section and select "start automatically", and it's replaced the "appear" animation in the list.


Is what I'm trying to do not possible?