What is the ruling on downloading religious lectures by a number of sheikhs from the internet and copying them for free distribution?

The default ruling is that it is permissible to copy and disseminate lessons and lectures, as this falls under good deeds and calling to Allah. However, this is conditional upon observing the intellectual property rights of their owners. If these rights are reserved and copying is not permitted, then it is not allowed except with the permission of the rights holders.