I did see the video.I can only watch from my phone but from what I saw, you Def want to get the low needle a lil higher. The reason I say this is because it LOOKS like you've not got enough smoke coming from the exhaust. HOWEVER... There appears to be a lot of oil on the ground... There are a couple things that would help me to see better as well as to likely help you out... Get the wheels on this thing! Seeing it roll in comparison to the rpms would help me to see better what it is doing. It will help you by keeping air moving across your AIR COOLED engine!

I would really like to know what your engine temps are. There are a few different theories with engine temp and tuning. While I don't think tuning should be based solely on the temp, it is very helpful on getting things close and keeping SAFE! Overheating is NOT good!!! If you don't already have one, put a digital thermometer on the 'buy now' list!!
Has this engine been broken in? If not, you MUST do this!
There are a couple threads that you REALLY want to read and LEARN! Full of things that every nitro person should know well! Parts worth printing out and sticking on the inside lid of your tool box!
https://www.rcnitrotalk.com/forum/threads/nitro-rc-beginners-guide.68224/
https://www.rcnitrotalk.com/forum/threads/nitro-tuning-tips-and-tuning-flow-chart.60832/
https://www.rcnitrotalk.com/forum/threads/glow-plugs-dos-donts-tech-and-tips.113922/#post-1111694
Learn this stuff!!! I mean REALLY learn it! It's good info! It will help you avoid headaches and make diagnosis easier. There are 2 different break in methods. I opt for the 'driving at low speeds' style vs the 'heat and cool' method but both work.