[openload] Fix extraction (#10408)

Thanks @TwelveCharzz again for studying openload codes

ChangeLog

@@ -1,6 +1,7 @@
 version <unreleased>
 
 Extractors
+* [openload] Fix extraction (#10408)
 * [adultswim] Fix extraction (#10979)
 * [hornbunny] Fix extraction (#10981)
 

youtube_dl/extractor/openload.py

@@ -82,7 +82,7 @@ class OpenloadIE(InfoExtractor):
             if j >= 33 and j <= 126:
                 j = ((j + 14) % 94) + 33
             if idx == len(enc_data) - 1:
-                j += 2
+                j += 3
             video_url_chars += compat_chr(j)
 
         video_url = 'https://openload.co/stream/%s?mime=true' % ''.join(video_url_chars)