let me inform you that the videos for the current week (for the upcoming lecture) are already on Youtube. In total they have only slightly more than 30 minutes. Therefore I believe that you will be able to watch them before our "lecture" on Wednesday even though I was a few hours late with their preparation. But your watching the videos would free me from the need to introduce the (somewhat convolved) theory and I could focus on example instead.
The quiz for the relevant topic will be taken (as usual) the next week.