CTF chall write-ups, files, scripts etc to go with video walkthroughs: https://www.youtube.com/CryptoCat23
CTFTime: https://ctftime.org
HackTheBox: https://app.hackthebox.eu
TryHackMe: https://tryhackme.com
OffSec Proving Grounds: https://www.offensive-security.com/labs
PentesterLab: https://pentesterlab.com
OverTheWire: https://overthewire.org/wargames
HackerOne: https://ctf.hacker101.com
Web Security Academy: https://portswigger.net/web-security
VulnHub: https://www.vulnhub.com
Damn Vulnerable Web Application: https://dvwa.co.uk
OWASP Juice Shop: https://github.com/juice-shop/juice-shop-ctf
Immersive Labs: https://dca.immersivelabs.online
ROP Emporium: https://ropemporium.com
Exploit Education: https://exploit.education
PicoCTF: https://play.picoctf.org
247CTF: https://247ctf.com
CryptoHack: https://cryptohack.org
HackingLab: https://www.hacking-lab.com/index.html
HackThisSite: https://www.hackthissite.org
SmashTheStack: http://smashthestack.org/wargames.html
W3Challs: https://w3challs.com/challenges
Ringzer0CTF: https://ringzer0ctf.com/challenges
Enigma Group: https://www.enigmagroup.org
Root Me: https://www.root-me.org
Reversing Challenges: https://challenges.re
CrackMes: https://crackmes.one
Pwnables: https://pwnable.tw/challenge
Pwn.College: https://pwn.college
How2Heap: https://github.com/shellphish/how2heap
LiveOverflow: https://www.youtube.com/playlist?list=PLhixgUqwRTjxglIswKp9mpkfPNfHkzyeN
John Hammond: https://www.youtube.com/c/JohnHammond010
IppSec: https://www.youtube.com/c/UCa6eh7gCkpPo5XXUDfygQQA
XCT: https://www.youtube.com/c/UClGm2C8Qi0_Wv68zfjCz2YA
Gynvael: https://www.youtube.com/user/GynvaelEN
ZetaTwo: https://www.youtube.com/c/ZetaTwo
PwnFunction: https://www.youtube.com/c/UCW6MNdOsqv2E9AjQkv9we7A
0xdf: https://www.youtube.com/c/UChO9OAH57Flz35RRX__E25A
247CTF: https://www.youtube.com/c/UCtGLeKomT06x3xZ2SZp2l9Q
MalFind: https://www.youtube.com/c/UCJf4-reOhoiAlScWC1WzLgQ
DayZeroSec: https://www.youtube.com/c/dayzerosec
Rana Khalil: https://www.youtube.com/c/RanaKhalil101
PinkDraconian: https://www.youtube.com/c/UCmXwpkCXmIKjoRLMsq9I3RA
Superhero1: https://www.youtube.com/c/UCm2SwKmx3Ya1HG5RmHR7SCA
S1lk: https://www.youtube.com/c/AlexChaveriat
Alh4zr3d: https://www.youtube.com/c/UCz-Z-d2VPQXHGkch0-_KovA
Paweł Łukasik: https://www.youtube.com/c/PawelLukasik
Ephemeral: https://www.youtube.com/c/BasteG0d69
Hak5: https://www.youtube.com/c/hak5
Conda: https://www.youtube.com/c/c0nd4
HackerSploit: https://www.youtube.com/c/HackerSploit
Condingo: https://www.youtube.com/c/codingo
InsiderPhd: https://www.youtube.com/c/InsiderPhD
HackSplained: https://www.youtube.com/c/Hacksplained
Others: https://securitycreators.video
https://apsdehal.in/awesome-ctf
https://github.com/CompassSecurity/security_resources
https://www.hacker101.com/resources
https://book.hacktricks.xyz
https://hshrzd.wordpress.com/how-to-start
https://guyinatuxedo.github.io
https://0xdf.gitlab.io/