Here's a compilation video of all notable high speed corners from 2019 season.
At first I only intended to do the really high speed corners like pouhon, but then I realised 2019 f1 cars made most corners that used to be medium speed into some pretty insane high speed ones (silverstone becketts for example). I had to do it in three parts due to 10 minutes limit on streamable, but I've included a list of included corners below. Notable exemption is turn 7 in china, which has been easy flat since 2017. Clips for each corner go in rough order from slowest to fastest, but it's not to be completely relied upon on who was actually fastest.
Part 1
australia - turns 11-12
bahrain - turns 5-6-7
spain - turns 1-2-3, turn 9 (campsa)
monaco - turn 12 (tabac), turns 13-14 (swimming pool section)
austria - turns 6-7, turns 9-10
https://streamable.com/8lfug
Part 2
germany - turn 1, turn 12
great britain - turn 9 (copse), turns 10-11-12-13 (maggots, becketts section), turn 15 (stowe)
hungary - turn 4, turn 11
belgium - turn 10 (pouhon)
italy - turns 8-9-10 (ascari), turn 11 (parabolica)
singapore - turns 22-23 (last corner)
https://streamable.com/r5dod
Part 3
japan - 1. sector S section, turns 13-14 (spoon)
mexico - 2. sector S section
USA - 1. sector S section, turn 19
brazil - turns 6-7 (ferradura)
https://streamable.com/yhcvh