feat: add option to force proxying of videos

src/invidious/config.cr

@@ -239,6 +239,8 @@ class Config
 
   property check_backends_interval : Int32 = 30
 
+  property force_local : Bool = true
+
   {% if flag?(:linux) %}
     property reload_config_automatically : Bool = true
   {% end %}

src/invidious/videos/video_preferences.cr

@@ -109,7 +109,9 @@ def process_video_params(query, preferences)
     quality = "high"
   end
 
-  if CONFIG.disabled?("local") && local
+  if CONFIG.force_local
+    local = true
+  elsif CONFIG.disabled?("local") && local
     local = false
   end
 

src/invidious/views/user/preferences.ecr

@@ -34,7 +34,10 @@
 
             <div class="pure-control-group">
                 <label for="local"><%= translate(locale, "preferences_local_label") %></label>
-                <input name="local" id="local" type="checkbox" <% if preferences.local && !CONFIG.disabled?("local") %>checked<% end %> <% if CONFIG.disabled?("local") %>disabled<% end %>>
+                <input name="local" id="local" type="checkbox" <% if CONFIG.force_local %>disabled="" <% end %><% if preferences.local && !CONFIG.disabled?("local") %>checked<% end %> <% if CONFIG.disabled?("local") %>disabled<% end %>>
+                <% if CONFIG.force_local %>
+                    <label for="local">(All videos are proxied by default)</label>
+                <% end %>
             </div>
 
             <div class="pure-control-group">