Well Part 91 of the series is about changing oil on gearbox and primary chain, so probably that is 'Part 2'.
Yes, as Stewe says fill the oil filter chamber and squirt oil down the pushrod tubes.
After you have put oil in the oiltank (do not overfill, you can top up later) loosen the banjo below the timing cover where you drained the oil untill oil seep out then tighten it. This to prime the feed pipe. Be carefull not to overtighten the banjobolts as they are rather fragile.
If the bike is newly assembled or has been standing for a long time I would also remove the bigend quill in the timing cover and push oil into the crankshaft. The video also showed the domed nut over the jet in top of the timing cover. I would also remove the nut and the jet and pour oil down there.
After starting, check that the oil is returning to oil tank by looking down the filler neck. You can shortly block the return stream with your finger to create a bit of extra pressure lubricating the rockers and and valve gear.