Is there a way to place a watermark in the same location (say bottom right corner) on a batch of different size videos?
Or do you have to resize all of the videos first into one standard size and then place the watermark?
Choosing "Watermark" -> "Area" and specifying parameters of the "Rectangle" menu you may achieve the required result. Notice, that you may specify parameters in pixels (pixel type), in percents (percent type) or in pixels relative to established value of indent from the opposite side (fixed type). A few experiments in combining these parameters will essentially gain your understanding of how to handle watermarks