Very nice bro. Never really wad a fan of big cars with big hp (Unless you have stick engine). I can see how bigger cars with higher hp/torque ratio can help with such long sustaining drifts you did in that video. I know that adjusting the to gear ratios work ad well but your camber looked fairly stock so I'm assuming your vette is nearly stock as well. Forgive me if it's not. Just a assumption.
I normally drift japanese cars and rarely do I ever have a drift car exceed over 400, let alone 300 hp unless it's bigger cars like supera or d1 cars (which I've never tried).
I say this because I figure it would be easier for a noob like me to sustain long drifts with out having to figure out perfect gear ratios per every track with already mid to high hp cars rather than working with 4 bangers or 6 cylinder ponies.
I use set ups from well reputable guys but I never asked or really adjusted gear ratios since mostly I run on tracks medium sized and usually end up in 2nd gear to 3rd unless I'm in a 4 banger with only 5th gear than I find the need to get to 4th.
Anyway, good drifting bro