Use Xbox Game Bar if you have Windows 10 or Java Edition, If you have PE, download a screen recorder or use Samsung Game Launcher. If you have Nintendo Switch/Xbox One you can record the TV screen. Trim the video and choose the YouTube option in Windows Movie Maker, so it doesn't take too long to upload.it's so stupid and inconvenient that they need video evidence. you can't be expected to record everytime you see a hacker bc they left too many opportunities open for people to hack