#include <StringConstants.au3> ; to declare the Constants of StringRegExp
#include <Array.au3> ; UDF needed for _ArrayDisplay and _ArrayConcatenate
Local $sRegex = "(?<=jw\.load\(\[\{ file: ')http[:\/a-zA-Z0-9_\.]+(?=',)"
Local $sString = "<html>" & @CRLF & _
"<script>" & @CRLF & _
"jw.load([{ file: 'http://vrbx105.xxx.xx/U7yvQnLiA_m5mhE9MUHf3w/1477628604/vl107aeb2d7db53f91fc6ad2e76fe11e49.mp4', provider: 'http' }]);" & @CRLF & _
"</script>" & @CRLF & _
"</html>"
Local $aArray = StringRegExp($sString, $sRegex, $STR_REGEXPARRAYFULLMATCH)
; Present the entire match result
_ArrayDisplay($aArray, "Result")
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