I can suggest a few things :
1) push your tube up over the shank barb ... the barb is there to keep your tube from pulling down on the hook (a minor problem with hollow tubes) Or, better yet, use a solid body tube, as it will stay on better/longer .
2) trim the yarn/string "stopper" down some, so that you don't get it all fouled up in your reel or line.
3) wet your Improved Clinch Knot prior to cinching it down to the jig eyelet. That will make the knot cinch down easier, plus lubricate the line so that friction heat of cinching the knot closed won't damage/weaken your line.
These are just "suggestions", as your video proves that your way works.