#include <MsgBoxConstants.au3> ; to declare the Constants of MsgBox
Local $sRegex = "(?m)"(.*?)"\:(http\S+?(?=\W+(?:$|\s))|http\S+)"
Local $sString = "Cqwertyuioy - Lasgfdf Sddgfdds (Dsajjsa Vsjsjk Osaskgkk Spfs) "link":http://www.youtube.com/watch?v=aQjkOmzQ8RT"
Local $sSubst = "[\1](\2)"
Local $sResult = StringRegExpReplace($sString, $sRegex, $sSubst)
MsgBox($MB_SYSTEMMODAL, "Result", $sResult)
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for AutoIt, please visit: https://www.autoitscript.com/autoit3/docs/functions/StringRegExp.htm