Yeah, what was it, 5 seconds with text and then it's just the little "i"? And I guess pointing to it won't work either because YT might completely change the position of the cards. But then again, maybe the cards will become more and more customizable.
Hm, anything popping up distracts the viewer so I wouldn't do that. In my case I'll have the most important part of the video right before the outro...
Right now, I'm thinking of making a card with playlist links plus the in-video-thing that shows up on every video. Is there a card with a subscribe button? I mean, the watermark is one but hardly anyone knows...