Hey,

Yes there are plenty of videos regarding different sections of CAT that are available free for students to take help. For accessing those videos you just need to register on the Unacademy app and set your Exam to CAT. After that in the left side you will find an option . Click on that and select free courses from  the drop down list. That's it now you can stream all the free videos.

Hope that Helps .

Thank you.