Where's this noise coming from?

I forgot to add that it was in drive with the parking brake engaged in both videos. It does make the noise in neutral, but it was so faint that I couldn't hear it without the hood up.

The guy that I dealt with at the consignment lot I bought it from said it had a stuck lifter. That ticking noise stopped after a Sea Foam treatment.

I haven't checked the u-joints yet. The ground gets really friggin' hot here, so I'll have to do that in the morning. We move into our apartment tomorrow so I'll have access to my garage and tools soon enough.