1. use ie browser to install qiucktime.

2. Install IDM (Internet? Download? Manager)

3. Click the triangle in the play interface, and IDM software will automatically download the lecture video.

Supplement:

1, with other browsers, IDM can't seem to recognize the download information, at least not my chrome.

2, be sure to install quicktime, you can't get download information without IDM.

3. Regarding the problem that it can't be played, I sent an email to the relevant person in charge of Peking University Lecture Hall Network and Modern Center, and one person replied to me, saying that flash plug-ins should be installed. But my flash is installed, and I still can't watch it online. Confused ~

4. There are two kinds of lecture videos, one with small lock icon and the other without. A lecture with a small lock needs an account, but the class teacher said that if you go to Peking University, you can also watch videos with a small lock by using the network of Peking University.

5. It can only be downloaded, not played online. I can only help you here.