Nothing happens after a video upload (Flashvideo does not pick up the file)

I have created a content template that uses the Flashvideo module. When a new node based on this content is created, the Video Upload form shows up and I am able to upload a video file. I add a [thumbnail] and [video] tag in the content body and save the node. I have set to let the cron job handle the conversion. ffmpeg is installed on my server and working correctly (I can convert videos from the command line just fine and some other applications like Gallery2 can use it too).
After saving and running the cron job by hand, the 'Video not available' image is shown. Looks like the Flashvideo filter is working, but the video file has not been processed any further.
I see that it's been uploaded to the main sites/files folder and not to the sites/files/video_import folder, which I was expecting.
Inspecting the database tells me that the file is listed in the files table, but there is no mention of it in the flashvideo table nor in de ffmpeg_data table.
It looks to me that the Flashvideo module forgets to add the new video file to the flashvideo table and/or conversion queue, or the module is not triggered at all during the save/upload process.

(When I add a flv video file to the flashvideo table by hand using the right nid, fid, status = 3, etc., the 'Video not available' image has disappeared but now I see a text saying 'flv filetypes are not supported'. But that's something for later I guess.)