Make youtube replacement domain configurable

daemon.py

@@ -6307,6 +6307,16 @@ class PubServer(BaseHTTPRequestHandler):
                                 setConfigParam(self.server.baseDir,
                                                'instanceTitle',
                                                fields['instanceTitle'])
+
+                        if fields.get('ytdomain'):
+                            currYTDomain = self.server.YTReplacementDomain
+                            if fields['ytdomain'] != currYTDomain:
+                                setConfigParam(self.server.baseDir,
+                                               'youtubedomain',
+                                               fields['ytdomain'])
+                                self.server.YTReplacementDomain = \
+                                    fields['ytdomain']
+
                         currInstanceDescriptionShort = \
                             getConfigParam(self.server.baseDir,
                                            'instanceDescriptionShort')

webinterface.py

@@ -1505,6 +1505,16 @@ def htmlEditProfile(translate: {}, baseDir: str, path: str,
         '      <textarea id="message" name="gitProjects" ' + \
         'style="height:100px">' + gitProjectsStr + '</textarea>'
 
+    editProfileForm += \
+        '      <br><b><label class="labels">' + \
+        translate['YouTube Replacement Domain'] + '</label></b>'
+    YTReplacementDomain = getConfigParam(baseDir, "youtubedomain")
+    if not YTReplacementDomain:
+        YTReplacementDomain = ''
+    editProfileForm += \
+        '      <input type="text" name="ytdomain" value="' + \
+        YTReplacementDomain + '">'
+
     editProfileForm += '    </div>'
     editProfileForm += '    <div class="container">'
     editProfileForm += \