Playing a combo of online video, images and dynamic text

The client wants to get some code written that will play the following things online in sequential order one after the other automatically once started: 1. Take a text input from the user 2. Play video 1 3. Play video 2 4. Display image 1, on top of it display image 2 (the two images have different sizes so image 1 will still be visible in part), show the text submitted by the user blinking on top of image 1 at a defined point, and shake all 3 elements in slightly different ways 5. Play video 3 We think the above can be done either in Flash or HTML5/by using FFMPEG etc but We are not sure. We have a slight preference for Flash, but can go with either solution. We also need these things to be buffering from the beginning in a way that once one element is done, the next starts buffering automatically so that there is no wait when we go from one step to the next. Also, The client wants the user to start seeing the stuff once some amount is buffered, as opposed to waiting till all videos etc have downloaded locally on to his machine. Please read the project first and write the word "Understood". Also write your steps and suggestions to complete the project with a short description of what you understood.