Excellent lectures of seismic studies were given by outstanding seismologists/geophysicists at the CIDER summer workshops. There are more lectures online: https://seismo.berkeley.edu/wiki_cider/CIDER_Lecture_Collection. But let's start with the following lectures.
Steve Grand, 2016: http://online.kitp.ucsb.edu/online/earth16/grand1/rm/jwvideo.html
Doug Wiens, 2012: https://youtu.be/ZKUFbdtfV7Y
Barbara Romanowicz, 2014: http://online.kitp.ucsb.edu/online/earth14/romanowicz1/rm/jwvideo.html
Goran Ekstrom, 2013: https://www.youtube.com/watch?v=2wiV0Ow5oT0&list=PLYTiwx6hV33vVnL2kt0i4-U23jq3fZa5p
Peter van Keken, 2017: https://www.youtube.com/watch?v=PAXsGCjsjv0&index=2&list=PL1i_IVTOFf5Y3cQs3AlxgMVymenTUueOv
Brandon Schmandt, 2017: https://www.youtube.com/watch?v=QEp6Ct8FZtE&list=PL1i_IVTOFf5Y3cQs3AlxgMVymenTUueOv&index=6
Geoff Abers, 2017: https://www.youtube.com/watch?v=28K7Jra18Vw&list=PL1i_IVTOFf5Y3cQs3AlxgMVymenTUueOv&index=11
Jeff Freymueller, 2017: https://www.youtube.com/watch?v=diCM9gr0_80&list=PL1i_IVTOFf5Y3cQs3AlxgMVymenTUueOv&index=13
Meredith Nettles, 2013: https://www.youtube.com/watch?v=5mCL6xB-8cA&list=PLYTiwx6hV33vVnL2kt0i4-U23jq3fZa5p
Gene Humphreys, 2013: https://www.youtube.com/watch?v=dWk7OMRZIHA&list=PLYTiwx6hV33vVnL2kt0i4-U23jq3fZa5p