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How to download the video lectures on this site, sometimes I can’t watch it if I don’t have access to the Internet

How to download the video lectures of this site, I sometimes can’t watch it if I don’t have the Internet connection

How to download this There are video lectures on this site. Sometimes I can’t watch the video lectures because I don’t have access to the Internet.

How to download the video lectures on this site. Sometimes I can’t watch the video lectures on this site if I don’t have access to the Internet.

How do I download the video lectures on this site? Is there any I couldn’t access the Internet at that time and couldn’t watch it