ok the video codec is intel video 5.10 pcm sound compression.Divx avi Does not seem to work with the avi object ,So i had to choose the standard windows codecs.
And just to be very clear Construct is still in it's beta form.Yes it is a wonderful program but it still lacks a few keypoints like creating proper video intro's etc...,And it's Free.Personally i don't like fmv intro's,Id much rather spend more time in creating more game content than worrying about fancy 3d fmv intro's.
I always skip the video intro's of games anyway.