If you can't get down, go to Taobao and buy a Thunder VIP in 2 yuan. Through offline download, these teaching videos can already be obtained on the offline download server. You download the link of the electric donkey file on Thunder by offline download, and Thunder will directly remind you of the existing data on the server, which can be downloaded directly.

The whirlwind of QQ also has this function, and many of my videos are downloaded like this.

As long as it is the resources owned by the electric donkey, Thunder and QQ whirlwind can be downloaded directly.