You're welcome to try one some friends and I hacked together a few years ago: http://thirdlobe.com/svn/web-proxy/trunk/
It's not my greatest or most efficient code (patches welcome), and it includes some features you probably don't need, but it's a web proxy, it uses POE, and it handles multiple connections and streaming.
Sample console output from your URL:
perl shproxy.pl
<P> Starting web proxy 'proxy-section' on port 1888.
<P> Entering main loop.
>>>>>>>>>>>>>>>>>>>>
GET http://193.68.124.87/axis-cgi/mjpg/video.cgi?camera=1&resolution=3
+52x288 HTTP/1.0
Cache-Control: no-cache
Pragma: no-cache
Accept: text/html, application/xml;q=0.9, application/xhtml+xml, image
+/png, image/jpeg, image/gif, image/x-xbitmap, */*;q=0.1
Accept-Charset: iso-8859-1, utf-8, utf-16, *;q=0.1
Accept-Encoding: deflate, gzip, x-gzip, identity, *;q=0
Accept-Language: en,fi;q=0.9,fr;q=0.8
Host: 193.68.124.87
User-Agent: Opera/9.51 (Macintosh; PPC Mac OS X; U; en)
Proxy-Connection: Keep-Alive
>>>>>>>>>>>>>>>>>>>>
<P> Request: http://193.68.124.87/axis-cgi/mjpg/video.cgi?camera=1&res
+olution=352x288
<P> Fetching: http://193.68.124.87/axis-cgi/mjpg/video.cgi?camera=1&re
+solution=352x288
<<<<<<<<<<<<<<<<<<<<
HTTP/1.0 200 OK
Cache-Control: no-cache
Connection: close
Pragma: no-cache
Content-Type: multipart/x-mixed-replace; boundary=--myboundary
Expires: Thu, 01 Dec 1994 16:00:00 GMT
<<<<<<<<<<<<<<<<<<<<
Chunk of 1428 octets.
Chunk of 1428 octets.
Chunk of 1428 octets.
Chunk of 1428 octets.
Chunk of 1428 octets.
Chunk of 1428 octets.
Chunk of 1428 octets.
^C
