This is very common. Why? Because about the 100' mark is where the Jato tires stop smoking and begin to hook up.

Seriously, it does take 30' or so for my Jato to stop burning rubber from a full throttle take-off. That is only with my little 2.5r Jato, not even the faster 3.3. Not that the T-maxx on an OS18 is any slouch, it has the bigger tire 4wd more traction advantage.

Kemo nailed it! Somebody definitely needs to learn to tune in that first video. Having a small block sound that low-pitched at wide open throttle is just wrong. What temps were running there? Maybe 150-165? Also, what happened to 2nd gear? Somebody has a serious over-rich issue there. I hope you get it solved (Or actually go out and buy some fresh 20% and re-watch the tuning video).