The IIT-Professor Assisted Learning (PAL) video lectures for Class XI and Class XII can be accessed on You Tube through the links shown below. Many faculty members from various IITs have contributed to these lectures. Prof. Ravi Soni from the Dept. of Physics, IIT Delhi is the national coordinator and IIT Delhi has coordinated this entire effort with funding from MHRD. Over 600 hours of lectures in Physics, Chemistry, Maths and Biology are available for students. 

Biology: Channel 19 - www.youtube.com/channel/UCqiFTyCxFFMAN_lhAzIkdpA/videos

Chemistry: Channel 20 - www.youtube.com/channel/UC3Zv0XxBjYlWMjbMv8ODE8Q/videos

Mathematics: Channel 21 - www.youtube.com/channel/UCfz4W0rG8HoyyrrK6qNc1rA/videos belonging

Physics: Channel 22 - www.youtube.com/channel/UCwNr8peMxn8-Nc2V_RZsRvg/videos

These videos can also be accessed on Doordarshan Freedish DTH. Complete list of videos is available at (Channel 19,20,21 and 22)

www.swayamprabha.gov.in/index.php/ch_allocation