I also have a problem getting two videos to show on an iPad. I am adding to your post instead of creating a duplicate thread.
My project has two progressive download videos, not visible. I use two click boxes with advanced actions to hide one video and show the other. On an iPad, click box 1 works fine. Click box 2 hides video 1, but video 2 never plays. I have used the videos in other projects, and have successfully created the same actions using audio clips.I have tried swapping the videos and the advanced actions, but I cannot get a second video to show on an iPad. The slide works fine on a PC. The project is published to Adobe Connect.