The Podcast (mod_pcast) does pretty much the same thing as shown in your video. It has a Comments capability, but it is not as conveniently located, but that is/was easy to fix. Back before I retired, I had modified things so that comments were in a better location when I was grading/watching/listening to student submissions.
You haven't mentioned your Moodle version, and I hesitate to mention this possibility, as the latest available release is for Moodle 3.4. But Content Pages (mod_content) would be perfect for this. Basically, the plugin lets you present info, text, pictures, audio, and video, in a fashion very similar to a presentation, like LO Impress or MS Power Point. For automatic grading purposes, you can add questions from the Moodle question bank, although not every question type is supported. Anyone in the class can post public or private notes, as well as ask questions which can be public or private between student and teacher. It is a real shame the plugin maintainer has not kept this up to date. I have it working in Moodle 3.7, and if I remember correctly, the only thing I had to fix was one place that was causing a bunch of, pix_url is deprecated, debug messages. In line 99 of addquestionpage.php, I changed the one occurrence of
pix_url to image_url and it fixed all of the deprecated entries I was getting. It is a great plugin for presenting material to students for study at their own pace, with question capabilities that let you verify that they have actually read, listened to, or watched the material being presented.