All perfect praise be to Allah, the Lord of the worlds. I testify that there is none worthy of worship except Allah and that Muhammad, sallallahu ‘alayhi wa sallam, is His slave and Messenger.
It is not obligatory on you to listen to this sermon; rather, your listening to it is permissible. So if you wish you may listen to it, and if you wish you may not listen. If you benefit from this sermon, then listening to it would be a good thing.
Allah knows best.