All tips and videos to get all author medals in Trackmania 2020 Training mode:

Training Campaign - Training 01:
Personal Best - 00:07.486
Author Medal - 00:07.528
Tip: hug the edges when cornering

Training Campaign - Training 02:
Personal Best - 00:07.103
Author Medal - 00:07.120
Tip: take turns wide enough not to lose speed

Training Campaign - Training 03:
Personal Best - 00:08.291
Author Medal - 00:08.305
Tip: enter the turn by positioning the car between the blue line and the red line while ensuring that the wheels remain parallel to the edges. You must manage the speed at the entrance to the corner so that the car does not leave the track.

Training Campaign - Training 04:
Personal Best - 00:07.504
Author Medal - 00:07.513
Tip: take advantage of the bulging road to jump over corners

Training Campaign - Training 05:
Personal Best - 00:10.543
Author Medal - 00:10.546
Tip: drift as little as possible with the car

Training Campaign - Training 06:
Personal Best - 00:11.295
Author Medal - 00:11.307
Tip: take wide turns and drift as little as possible with the car to lose as little speed as possible

Training Campaign - Training 07:
Personal Best - 00:08.280
Author Medal - 00:08.306
Tip: keep the car parallel to the roadside

Training Campaign - Training 08:
Personal Best - 00:11.948
Author Medal - 00:11.958
Tip: take the right path and stick to the edges when cornering

Training Campaign - Training 09:
Personal Best - 00:12.215
Author Medal - 00:12.217
Tip: steer the car before specials blocks so as not to touch obstacles or the edges of the road

Training Campaign - Training 10:
Personal Best - 00:11.748
Author Medal - 00:11.750
Tip: turn by tightening the edges to the maximum

Training Campaign - Training 11:
Personal Best - 00:05.048
Author Medal - 00:05.053
Tip: intermittently accelerate so that the car goes lower

Training Campaign - Training 12:
Personal Best - 00:11.305
Author Medal - 00:11.340
Tip: take it wide and touch the bottom of the springboard with the wheels of the car to make as little airtime as possible

Training Campaign - Training 13:
Personal Best - 00:12.251
Author Medal - 00:12.260
Tip: drift as little as possible and take the second boost as low as possible

Training Campaign - Training 14:
Personal Best - 00:12.166
Author Medal - 00:12.217
Tip: brake at the top of the climb to keep the car stuck to the ground and turn as little as possible

Training Campaign - Training 15:
Personal Best - 00:13.478
Author Medal - 00:13.484
Tip: brake before the first jump so as not to break the car then accelerate fully to jump over the slow motion block

Training Campaign - Training 16:
Personal Best - 00:15.928
Author Medal - 00:15.954
Tip: drift around corners without touching the edges to lose the least time and speed possible

Training Campaign - Training 17:
Personal Best - 00:18.064
Author Medal - 00:18.177
Tip: take wide turns by intermittently releasing the accelerator

Training Campaign - Training 18:
Personal Best - 00:16.244
Author Medal - 00:16.304
Tip: stay towards the center of the runway so as not to take off from the ground and drift in the last turn

Training Campaign - Training 19:
Personal Best - 00:17.720
Author Medal - 00:18.134
Tip: attack the first corner by positioning the car between the blue line and the red line then try to keep the wheels parallel to the edges while managing the speed so as not to pass over it. Brake at the checkpoint when approaching the second turn while raising the front wheels to slow the car even more and then bring the wheels parallel to the edges while putting the throttle on

Training Campaign - Training 20:
Personal Best - 00:26.530
Author Medal - 00:26.725
Tip: drift in the first corner, take the second widest corner possible, attack the third corner in the center of the road then dive inside without skidding, finally attack the last corner on the ice by positioning the car between the blue line and the red line then try to position the wheels parallel to the edges, taking care not to go over

Training Campaign - Training 21:
Personal Best - 00:16.675
Author Medal - 00:16.677
Tip: Turn with the car before the descent to avoid air time and stay on the ground. Drive diagonally downhill to gain a little more speed and position the car on the left when approaching the first corner. Brake while turning and accelerating to drift slightly in the first turn towards the apex. Position the car on the right of the road when approaching the hairpin then start drifting just before the checkpoint so as to slide the car on the grass to redirect it in the direction of the opposite road.

Training Campaign - Training 22:
Personal Best - 00:18.451
Author Medal - 00:18.542
Tip: Turn with the car before the descent to avoid air time and stay on the ground. Drive diagonally downhill to gain a little more speed and position the car on the left when approaching the first corner, which must be taken as wide as possible so as not to lose too much speed. Position the car to the right of the road when approaching the hairpin, then start drifting just before the checkpoint so as to slide the car over the sand to redirect it towards the opposite road.

Training Campaign - Training 23:
Personal Best - 00:22.620
Author Medal - 00:23.153
Tip: Keep the wheels straight downhill to gain as much speed as possible on the ice. Release the accelerator and steer the car towards the inside of the first corner, then steer the wheels opposite while accelerating. By doing this, the car will gain speed while being perpandicular to the road. At the end of a turn, release the accelerator and redirect the car in the direction of the road then accelerate again while trying to position the car on the right of the track. When approaching the checkpoint, completely release the accelerator and steer the car in the opposite direction, then while orienting the wheels opposite, press fully on the accelerator and the brake so that the car slides in the hairpin and set off again in the right direction without losing too much speed

Training Campaign - Training 24:
Personal Best - 00:19.457
Author Medal - 00:19.484
Tip: Keep the wheels straight downhill to gain as much speed as possible on the grass. Position the car on the left of the track when approaching the first turn, then drift aiming for the apex and taking care not to leave the track. Accelerate at the end of the turn, having the wheels parallel to the edges of the track. Then position the car on the right of the track. Turn briefly to the right to catch the grass outside the track with the right wheels then drift so as to cut the track just after the checkpoint while redirecting the car in the direction of the opposite road.

Training Campaign - Training 25:
Personal Best - 00:35.310
Author Medal - 00:36.363
Tip: Brake and turn just before the descent so as not to break the car and take advantage of the descent to gain speed. Then position the car on the left of the track when approaching the first corner. Brake while orienting the car towards the apex so as to drift slightly and take the tightest turn possible while keeping wheels on the track. Brake before the second descent, always so as not to break the car. Then position the car on the right of the track and just before the checkpoint, start drifting to the left to cut the road just after the checkpoint while orienting the car in the direction of the opposite road. Re-accelerate while having the wheels parallel to the edges of the track. Position the car on the left of the track then start braking well before the next checkpoint so that the car slides on the grass. Cut the hairpin just after the checkpoint. Then while orienting the wheels to the right, press the accelerator and the brake fully to position the car in the right direction while regaining speed. Position the car on the right of the track then release the accelerator just before the checkpoint to steer the car towards the inside of the turn. Then, while turning the wheels opposite, accelerate fully, keeping the rear wheels on the track to drift in the hairpin while keeping speed. At the end of a turn, release the accelerator and redirect the car so that the wheels are parallel to the track. Finally, accelerate fully to reach the finish.