I am using latest sdk (via C# wrapper), customized UI. I may be wrong, but Resize() is not available on video elements. video containers have a Resize() method, but video elements have only SetPos().
Here is the screenshot, I’ve blurred out some details but as you can see “powered by zoom” is in the middle of the face. This is because it was originally in a corner, but didn’t move when the container and element have been resized.
In my setup I have a single video container with a single video element inside, both with the same dimension. The watermark is initially in the bottom right corner of the video, but then when I resize the window (calling Resize() on the video container and SetPos on the video element) the watermark does not move and remains in the original position. Depending if I shrink/enlarge the window, it may cover the middle of the resized video.