I have great interest in martial arts, especially in judo technique. I really want to learn it but there is no such training institute . Is it possible to learn it from book and video lectures or some sort of virtual training? I am really looking forward to it.
If there's no local schools, your best bet is either finding someone local who has done any decent amount of judo, or, finding a school or instructor in a related grappling art. Any form of wrestling will give some related tools.
Part of this is that grappling is about manuevering other people's bodies and manuevering your own around what they're doing - you can't really learn that alone. The other part is that a lot of manuevers or actions can be trained safely, or unsafely, and having someone who has already done a grappling art will allow you to learn how to do that, instead of risking yourself or your partners going in blind.
Once you have some basis and people to train with, then you can really make use of videos - if you already have a good feel for balance, locks, etc. you can start to practice new ones you don't know.