diff --git a/src/invidious/http_server/utils.cr b/src/invidious/http_server/utils.cr
index 623a9177..c42a832f 100644
--- a/src/invidious/http_server/utils.cr
+++ b/src/invidious/http_server/utils.cr
@@ -4,7 +4,7 @@ module Invidious::HttpServer
   module Utils
     extend self
 
-    def proxy_video_url(raw_url : String, *, region : String? = nil, absolute : Bool = false)
+    def proxy_video_url(raw_url : String, *, region : String? = nil, absolute : Bool = false, host : String? = "")
       url = URI.parse(raw_url)
 
       # Add some URL parameters
@@ -14,7 +14,7 @@ module Invidious::HttpServer
       url.query_params = params
 
       if absolute
-        return "#{HOST_URL}#{url.request_target}"
+        return "#{host}#{url.request_target}"
       else
         return url.request_target
       end
diff --git a/src/invidious/routes/api/manifest.cr b/src/invidious/routes/api/manifest.cr
index bddf97cb..425a92cc 100644
--- a/src/invidious/routes/api/manifest.cr
+++ b/src/invidious/routes/api/manifest.cr
@@ -1,6 +1,8 @@
 module Invidious::Routes::API::Manifest
   # /api/manifest/dash/id/:id
   def self.get_dash_video_id(env)
+    host = env.request.headers["Host"]
+
     env.response.headers.add("Access-Control-Allow-Origin", "*")
     env.response.content_type = "application/dash+xml"
 
@@ -36,7 +38,7 @@ module Invidious::Routes::API::Manifest
       # Other API clients can get the original URLs by omiting `local=true`.
       manifest = response.body.gsub(/<BaseURL>[^<]+<\/BaseURL>/) do |baseurl|
         url = baseurl.lchop("<BaseURL>").rchop("</BaseURL>")
-        url = HttpServer::Utils.proxy_video_url(url, absolute: true) if local
+        url = HttpServer::Utils.proxy_video_url(url, absolute: true, host: host) if local
         "<BaseURL>#{url}</BaseURL>"
       end
 
@@ -46,7 +48,7 @@ module Invidious::Routes::API::Manifest
     # Ditto, only proxify URLs if `local=true` is used
     if local
       video.adaptive_fmts.each do |fmt|
-        fmt["url"] = JSON::Any.new(HttpServer::Utils.proxy_video_url(fmt["url"].as_s, absolute: true))
+        fmt["url"] = JSON::Any.new(HttpServer::Utils.proxy_video_url(fmt["url"].as_s, absolute: true, host: host))
       end
     end
 
diff --git a/src/invidious/routes/embed.cr b/src/invidious/routes/embed.cr
index 930e4915..99199268 100644
--- a/src/invidious/routes/embed.cr
+++ b/src/invidious/routes/embed.cr
@@ -34,6 +34,7 @@ module Invidious::Routes::Embed
 
   def self.show(env)
     locale = env.get("preferences").as(Preferences).locale
+    host = env.request.headers["Host"]
     id = env.params.url["id"]
 
     plid = env.params.query["list"]?.try &.gsub(/[^a-zA-Z0-9_-]/, "")
@@ -161,11 +162,11 @@ module Invidious::Routes::Embed
     adaptive_fmts = video.adaptive_fmts
 
     if params.local
-      fmt_stream.each { |fmt| fmt["url"] = JSON::Any.new(HttpServer::Utils.proxy_video_url(fmt["url"].as_s)) }
+      fmt_stream.each { |fmt| fmt["url"] = JSON::Any.new(HttpServer::Utils.proxy_video_url(fmt["url"].as_s, host: host)) }
     end
 
     # Always proxy DASH streams, otherwise youtube CORS headers will prevent playback
-    adaptive_fmts.each { |fmt| fmt["url"] = JSON::Any.new(HttpServer::Utils.proxy_video_url(fmt["url"].as_s)) }
+    adaptive_fmts.each { |fmt| fmt["url"] = JSON::Any.new(HttpServer::Utils.proxy_video_url(fmt["url"].as_s, host: host)) }
 
     video_streams = video.video_streams
     audio_streams = video.audio_streams
diff --git a/src/invidious/routes/video_playback.cr b/src/invidious/routes/video_playback.cr
index 083087a9..5368df68 100644
--- a/src/invidious/routes/video_playback.cr
+++ b/src/invidious/routes/video_playback.cr
@@ -2,6 +2,7 @@ module Invidious::Routes::VideoPlayback
   # /videoplayback
   def self.get_video_playback(env)
     locale = env.get("preferences").as(Preferences).locale
+    host_ = env.request.headers["Host"]
     query_params = env.params.query
 
     fvip = query_params["fvip"]? || "3"
@@ -107,7 +108,7 @@ module Invidious::Routes::VideoPlayback
           env.response.headers["Access-Control-Allow-Origin"] = "*"
 
           if location = resp.headers["Location"]?
-            url = Invidious::HttpServer::Utils.proxy_video_url(location, region: region)
+            url = Invidious::HttpServer::Utils.proxy_video_url(location, region: region, host: host_)
             return env.redirect url
           end
 
@@ -165,7 +166,7 @@ module Invidious::Routes::VideoPlayback
               env.response.headers["Access-Control-Allow-Origin"] = "*"
 
               if location = resp.headers["Location"]?
-                url = Invidious::HttpServer::Utils.proxy_video_url(location, region: region)
+                url = Invidious::HttpServer::Utils.proxy_video_url(location, region: region, host: host_)
 
                 if title = query_params["title"]?
                   url = "#{url}&title=#{URI.encode_www_form(title)}"
diff --git a/src/invidious/routes/watch.cr b/src/invidious/routes/watch.cr
index e777b3f1..d34eb33d 100644
--- a/src/invidious/routes/watch.cr
+++ b/src/invidious/routes/watch.cr
@@ -4,6 +4,7 @@ module Invidious::Routes::Watch
   def self.handle(env)
     locale = env.get("preferences").as(Preferences).locale
     region = env.params.query["region"]?
+    host = env.request.headers["Host"]
 
     if env.params.query.to_s.includes?("%20") || env.params.query.to_s.includes?("+")
       url = "/watch?" + env.params.query.to_s.gsub("%20", "").delete("+")
@@ -121,11 +122,11 @@ module Invidious::Routes::Watch
     adaptive_fmts = video.adaptive_fmts
 
     if params.local
-      fmt_stream.each { |fmt| fmt["url"] = JSON::Any.new(HttpServer::Utils.proxy_video_url(fmt["url"].as_s)) }
+      fmt_stream.each { |fmt| fmt["url"] = JSON::Any.new(HttpServer::Utils.proxy_video_url(fmt["url"].as_s, host: host)) }
     end
 
     # Always proxy DASH streams, otherwise youtube CORS headers will prevent playback
-    adaptive_fmts.each { |fmt| fmt["url"] = JSON::Any.new(HttpServer::Utils.proxy_video_url(fmt["url"].as_s)) }
+    adaptive_fmts.each { |fmt| fmt["url"] = JSON::Any.new(HttpServer::Utils.proxy_video_url(fmt["url"].as_s, host: host)) }
 
     video_streams = video.video_streams
     audio_streams = video.audio_streams