There are still tests and concept videos left to complete as I enrolled in to crash course and daily target late as earlier I was doing self-preparation. Now that very little time is left, how should I focus on my preparation ? Should I just give mocks and batch/daily target tests ?

Hi, since you have done some amount of self-preparation, you will know where you stand with respect to a topic. So, try to see the concept videos only of the topics that you are not very comfortable with. For topics that you find easy to tackle, you can directly take the concept test and proceed.
Leaving out all concept videos altogether might result in certain important topics/concepts left unattended, which might affect your final performance. Keep giving mocks at regular intervals(do not overstress yourself in this final phase of your preparation). As far as daily targets are concerned, they won't take much of your time during the day. Hence, you can still follow a well-balanced preparation plan for the one month that remains, and ensure that you fill the gaps in your fundamentals and also get used to taking a good number of mocks/sectional tests. Wish you all the best for CAT!