Online Video Commercial

Create a 30 second web video - along the lines of: [login to view URL] I will have the 6 or 7 stock videos that you will cut and place in sequence. You will have some frames of words like in the above example. I want a format that will be allowed to be uploaded to most of the video sites like youtube and so forth. Must be in a format that will be easy for me to change the wording whenever I want on the frames. The ad will stay the same, I just want to be able to change the words on the frame.