Tapping noise when on load

Hi all, just double checking suggestions about this tapping noise very loud when the car is in gear.

Here's the video:



Engine is a 318, probably tired and some white smoke coming from the exhaust.

I checked the lifters and it seems to be all good. Can it be valves?

If it was a tad easier to remove the oil pan I would go for new pistons rings, etc but hey. Any suggestion is appreciated. Thank you.
Author: DToro