The main key to parachuting is to go about 500m away from your target, or as close as possible, then dive at 200-210 kmh until 110-120m away, then dive straight down, hitting 120+ kmh on the dive on the 3 big maps. Sanhok, you want to jump at 1.1 km, then dive at 120m away. Taego exploding planes, you want to jump as close to the target as possible, then dive at 110-120m.
The big thing is to try to jump at a distance where you can glide at 200 kmh as much of the path as possible.
Please let me know if you have questions or videos you’d like to see.
Credit to Akasharoo for the video outro.