The nice thing about free classes, from the IRS or any other provider, is that if it's not what I wanted I just turn it off. Or, leave it on in case it offers something I need while I multi-task, answer emails, whatever. I have plenty of CEs and haven't wasted any money, so I can log out whenever I want.
If I know the instructor is good, I keep it on in case I learn at least one new thing. If the instructor is poor, I log out. Or, I log in later to the archive when I can fast forward to find any parts of the agenda that I think could interest me. I won't stay tuned in for 50 minutes if the instructor isn't engaging me!