I have a subscription of a site from where I can see educational videos. That site doesn't have the functionality to download these contents so that I can check it later. They do offer offline caching but with some extra charges.
Most of the contents are available on the web through torrents. My question is, is it permissible to download these through torrents?
Note: I have the right to check it online if net is available.
You should check the copyright details on their videos. More precisely, it seem like they are charging for a service you would be getting otherwise for free, if you torrent them. So, If you are still confused, then it would be best to email them for their opinion. In Islam educators are held in high regards; our relationship with them is equivalent to a slave to his master. Eloquently said by Imam Ali:
"I am a slave of he who teaches me one letter of the alphabet. If he
wishes, he may sell me; if he so desires, he may set me free; and if
he cares to, he may deploy me as a slave"
No, it is not permissible to download these through torrents.
The teacher and producer of these videos have worked on it and they'd hope that they would get some income from these videos. But when you download or copy it without their permission then it is like you've robbed their money. It's like you get a worker for a building, and when he is done, you don't pay him.
Like any library, Islam Stack Exchange offers great information, but does not offer personalized advice or legal verdicts, and does not take the place of seeking such advice from your Mufti, Imam, or other trustworthy Counselor.