My idea is so very simple. Why should we simulate one screen TV’s? Let the content creator manage two windows on youtube or other video sites. One with static images and the old original video window.
With a dual window setup the viewer can watch the video without having to click away those irretating in window popups.
This will make it a lot more effective for ads. Here the viewer do not need to click away the ads.
For educational or other purposes a dual window setup can make it easier for the viewer to remember important information. Also a synced slide functionality for the static window might prove useful.