Fix PostProcessor hooks not registered for some PPs

Closes #1993

yt_dlp/YoutubeDL.py

@@ -634,13 +634,6 @@ class YoutubeDL(object):
                 self.print_debug_header()
             self.add_default_info_extractors()
 
-        for pp_def_raw in self.params.get('postprocessors', []):
-            pp_def = dict(pp_def_raw)
-            when = pp_def.pop('when', 'post_process')
-            pp_class = get_postprocessor(pp_def.pop('key'))
-            pp = pp_class(self, **compat_kwargs(pp_def))
-            self.add_post_processor(pp, when=when)
-
         hooks = {
             'post_hooks': self.add_post_hook,
             'progress_hooks': self.add_progress_hook,
@@ -650,6 +643,13 @@ class YoutubeDL(object):
             for ph in self.params.get(opt, []):
                 fn(ph)
 
+        for pp_def_raw in self.params.get('postprocessors', []):
+            pp_def = dict(pp_def_raw)
+            when = pp_def.pop('when', 'post_process')
+            self.add_post_processor(
+                get_postprocessor(pp_def.pop('key'))(self, **compat_kwargs(pp_def)),
+                when=when)
+
         register_socks_protocols()
 
         def preload_download_archive(fn):
@@ -736,6 +736,9 @@ class YoutubeDL(object):
     def add_postprocessor_hook(self, ph):
         """Add the postprocessing progress hook"""
         self._postprocessor_hooks.append(ph)
+        for pps in self._pps.values():
+            for pp in pps:
+                pp.add_progress_hook(ph)
 
     def _bidi_workaround(self, message):
         if not hasattr(self, '_output_channel'):