In these two shlokas, importance of Sri Rudram and Panchakshari mantras are being discussed.
In sl. 36, Acharya beautifully conveys the process of Punyahavachanam to purify ones mind with the Sri Rudra Mantra. In sl. 37, the crux of the Vedas, and Sri Rudra prashna i.e., the Shiva Panchakshari Mantra and its benefits are described.
Explanation start from 17:50 mins onwards:
Hara Hara Shankara Jaya Jaya shankara.