The video is good and reminds me that there are different set ups for valve adjustments, depending upon make. The good part of this is to show the use of the feeler gauge to newbies although you cannot feel the drag of the feeler gauge he feels, that will come with practice. I suggest you always check your clearance after tightening. Even with the feeler gauge "trapped" as in the video it is common that the final lock down will reduce the clearance you have chosen. This is not good , esp on exhaust valves. Patience. This gentleman provides a real service. I think he may be the one who showed the poor man's trimmer voltage tester, diy this forum.