rds_correia,  SciTE is the editor which is installed with Autoit - but as you have not installed it......   You are missing a lot - the full version od SciTE4AutoIt3 which you can download here offers lots of extra goodies to help you code in AutoIt.  But I believe you need to have both SciTE and AutoIt installed for it to give you full functionality.   Try this version which only uses MsgBox dialogs:   #include <Array.au3>
#include <File.au3>
#include <Date.au3>
Global $sRoot = "C:surveillance"
Global $aPath[5] = [4, "580001", "000", "00", "00"]
Global $sCamera_ID = "323"
Global $sYesterday = StringReplace(_DateAdd("D", -1, @YEAR & "/" & @MON & "/" & @MDAY), "/", "-")
Global $sBefore_Yesterday = StringReplace(_DateAdd("D", -2, @YEAR & "/" & @MON & "/" & @MDAY), "/", "-")
; Find last folder
$aFolder_List = _Last_Folder($aPath)
; Work backwards through the folder list
For $i = $aFolder_List[0] To 1 Step -1
    ; Read the list of files in this folder
    $aFile_List = _FileListToArray($aFolder_List[$i] & "", "*.xml", 1)
    ;_ArrayDisplay($aFile_List, $aFolder_List[$i])
    If IsArray($aFile_List) Then
        If _Check_Files($aFile_List, $aFolder_List[$i]) Then
            ; We have reached the files from 2 days ago
            ExitLoop
        EndIf
    Else
        ; There are no files to check - this should never happen
        ExitLoop
    EndIf
Next
MsgBox(0, "Done", "All files from " & $sYesterday & @CRLF & "taken by camera " & $sCamera_ID & @CRLF & "have been dealt with")
Func _Check_Files($aArray, $sPath)
    ; Clear the "day before yesterday" flag
    $fEnded = False
    For $i = $aArray[0] To 1 Step -1
        ; Read the content of the file
        $sFile_Content = FileRead($sPath & $aArray[$i])
        ; Is it the correct date
        $aDate = StringRegExp($sFile_Content, "(?i)(?U)starttime>(.*)x20", 3)
        Switch $aDate[0]
            Case $sYesterday
                ; Is it the correct camera
                $aCamera = StringRegExp($sFile_Content, "(?i)(?U)servicename>(.*)<", 3)
                If $aCamera[0] = $sCamera_ID Then
                    ; Extract the .avi name
                    $aAVI = StringRegExp($sFile_Content, "(?i)(?U)filename>(.*)<", 3)
                    ; And display the data
					MsgBox(0, "Action needed", _
                    "File: " & $sPath & $aArray[$i] & @CRLF & @CRLF & _
                    "Avi: " & $sPath & $aAVI[0] & @CRLF & " could now be copied")
                EndIf
            Case $sBefore_Yesterday
                ; Set the flag
                $fEnded = True
                ; No point in going back further
                ExitLoop
        EndSwitch
    Next
    Return $fEnded
EndFunc
Func _Last_Folder($aPath)
    ; Create an array to hold the list of folders found
    Local $aFolders[100] = [1, $sRoot & _ArrayToString($aPath, "", 1, 4) & ""]
    While 1
        ; Add 1 to the folder and reset to 00 if needed
        $aPath[4] = StringFormat("%02i", Mod($aPath[4] + 1, 100))
        ; If we did reset to 00 then we need to check the level above
        If $aPath[4] = "00" Then
            ; Again we add 1 and reset to 00 if required
            $aPath[3] = StringFormat("%02i", Mod($aPath[3] + 1, 100))
            ; And if we reset to 00 we need to check the level above
            If $aPath[3] = "00" Then
                ; Add 1 but this time we reset to 000 if required
                $aPath[2] = StringFormat("%03i", Mod($aPath[2] + 1, 1000))
                ; And again we move up a level if the lower folder was reset
                If $aPath[2] = "000" Then
                    ; If this one gets to 589999 then you need to restart - or add another level to this tree!
                    $aPath[1] = $aPath[1] + 1
                EndIf
            EndIf
        EndIf
        ; Now see if this path exists
        $sNext_Path = $sRoot & _ArrayToString($aPath, "", 1, 4) & ""
        If Not FileExists($sNext_Path) Then
            ; If the path does not exist then we return the list of folders found
            ReDim $aFolders[$aFolders[0] + 1]
            Return $aFolders
        Else
            ; The folder exists so add it to the array - resizing if necessary
            $aFolders[0] += 1
            If UBound($aFolders) <= $aFolders[0] Then
                ReDim $aFolders[$aFolders[0] * 2]
            EndIf
            $aFolders[$aFolders[0]] = $sNext_Path
        EndIf
    WEnd
EndFuncDo you get the results now?   M23