$ wget --user-agent="Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0; WOW64; SLCC1; .NET CLR 2.0.50727; .NET CLR 3.0.04506; .NET CLR 1.1.4322; InfoPath.2)" -
d -Outub_2.xml "http://www.youtube.com/get_video_info?&video_id=VFGVzt7c5bY"

Setting --output-document (outputdocument) to utub_2.xml
DEBUG output created by Wget 1.11.3 on cygwin.

--2009-05-01 14:38:48--  http://www.youtube.com/get_video_info?&video_id=VFGVzt7c5bY
Resolving www.youtube.com... 208.117.236.76
Caching www.youtube.com => 208.117.236.76
Connecting to www.youtube.com|208.117.236.76|:80... connected.
Created socket 4.
Releasing 0x00f80f88 (new refcount 1).

---request begin---
GET /get_video_info?&video_id=VFGVzt7c5bY HTTP/1.0
User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0; WOW64; SLCC1; .NET CLR 2.0.50727; .NET CLR 3.0.04506; .NET CLR 1.1.4322; InfoPath.2)
Accept: */*
Host: www.youtube.com
Connection: Keep-Alive

---request end---
HTTP request sent, awaiting response...
---response begin---
HTTP/1.1 200 OK
Date: Fri, 01 May 2009 21:38:49 GMT
Server: Apache
X-Content-Type-Options: nosniff
Expires: Tue, 27 Apr 1971 19:44:06 EST
X-YouTube-MID: WkFSZzctYUFHdmhPdXRNV25jS3JEb3NiS0JUbGhDZkR4aFJ5TXdYRFhaSW5QUklVRlNJN0ln
Cache-Control: no-cache
Content-Length: 504
Keep-Alive: timeout=300
Connection: Keep-Alive
Content-Type: application/x-www-form-urlencoded

---response end---
200 OK
Registered socket 4 for persistent reuse.
Length: 504 [application/x-www-form-urlencoded]
Saving to: `utub_2.xml'

100%[======================================================================================================================>] 504         --.-K/s   in 0s

OUTPUT:

status=ok&author=macattck2533&title=Giant LEGO Boulder&muted=0&avg_rating=4.74888211382&video_id=VFGVzt7c5bY&length_seconds=89&vq=None&fmt_map=18/512000/9/0/115,34/0/9/0/115,5/0/7/0/0&token=vjVQa1PpcFO20YfQf-PC05xUFqFMJw-RffWDaQVHL1U=&thumbnail_url=http://i3.ytimg.com/vi/VFGVzt7c5bY/default.jpg&allow_ratings=1&plid=AARo4KNb6AegVoTO&keywords=LEGO,Boulder,Ball,LEGOS,Indiana,Jones,Indy,San,Francisco,Hill,Million,Funny&ftoken=&track_embed=0

first call gets token, second call uses token for the actual media

youtube - call 1 get token for video

Bash