Download Link Not Working

What steps will reproduce the problem?
1. Click any of the "Download this video as" links.
2.
3.

What is the expected output?
Video should download

What do you see instead?
I am taken to a blank white page. example of url of one such page: 
http://www.youtube.com/get_video?video_id=Zn5UYputoao&t=vjVQa1PpcFNklE-Qy515MYk6
XjmzzmaKAGZ3GH5fKt0=&fmt=18

What is the debugString? To get the debugString, open up the Options panel,
and click the link from links that reads "debugString". Note that this step
is extremely important and contains a wealth of information for me to use
in fixing your issue.

({vq:0, player:0, autoplay:true, autobuffer:false, usecolor:true, c1:"000000", 
c2:"FFFFFF", hidenotes:false, hideRate:false, fit:false, bigMode:true, 
min:false, true720p:false, useVol:false, vol:"50", snapBack:false, loop:false, 
autoCinema:false, utterBlack:false, jumpToPlayer:false, 
swfArgs:{rec_keywords:"Interactive+personality+test+quiz+story+deadly+animal+ama
zingphil+phil+adventure+beast+bear+tiger+fight+which+are+you+beware+of+the+giant
+squirrels", 
fmt_url_map:"35|http://v2.lscache8.c.youtube.com/videoplayback?ip=0.0.0.0&sparam
s=id%2Cexpire%2Cip%2Cipbits%2Citag%2Calgorithm%2Cburst%2Cfactor%2Coc%3AU0dXRlNMV
19FSkNNN19LRkFD&fexp=907003&algorithm=throttle-factor&itag=35&ipbits=0&burst=40&
sver=3&expire=1281319200&key=yt1&signature=13792B4A2F802D44B03B00BDD5A7C09C67C7A
CEF.53A66B39CFBAB02FAAEC6C6BF36ACAFEC71595F0&factor=1.25&id=667e54629bada1aa,34|
http://v24.lscache5.c.youtube.com/videoplayback?ip=0.0.0.0&sparams=id%2Cexpire%2
Cip%2Cipbits%2Citag%2Calgorithm%2Cburst%2Cfactor%2Coc%3AU0dXRlNMV19FSkNNN19LRkFD
&fexp=907003&algorithm=throttle-factor&itag=34&ipbits=0&burst=40&sver=3&expire=1
281319200&key=yt1&signature=8EFC9B838CE9B5BF74AD7126613F481C7BDC544F.3469ABA170C
AA6F0C7D173D2E3BF9A5D7CDC1E67&factor=1.25&id=667e54629bada1aa,5|http://v21.lscac
he7.c.youtube.com/videoplayback?ip=0.0.0.0&sparams=id%2Cexpire%2Cip%2Cipbits%2Ci
tag%2Calgorithm%2Cburst%2Cfactor%2Coc%3AU0dXRlNMV19FSkNNN19LRkFD&fexp=907003&alg
orithm=throttle-factor&itag=5&ipbits=0&burst=40&sver=3&expire=1281319200&key=yt1
&signature=D2ED0AB69ED49A4D8CD7E9BE1B5589462BF8B0DE.72BFA1F62A1A5A75A1DB184E55DA
B5188C2CF8BD&factor=1.25&id=667e54629bada1aa", 
keywords:"Interactive,personality,test,quiz,story,deadly,animal,amazingphil,phil
,adventure,beast,bear,tiger,fight,which,are,you,beware,of,the,giant,squirrels", 
cc3_module:"http://s.ytimg.com/yt/swf/subtitles3_module-vfl181412.swf", 
fmt_list:"35/854x480/9/0/115,34/640x360/9/0/115,5/320x240/7/0/0", 
iv_storage_server:"http://www.google.com/reviews/y/", 
targeting_video_doc_id:"", 
tk:"oMAUJ8ZqHRsEEXT54BVpmZUJDQMNQGw9l82y_A4uCI3z_9sX-XcTwA==", sffb:"True", 
timestamp:"1281297480", rec_server:"sjl-webcam4.sjl.youtube.com:80", 
cc_asr:"1", showpopout:"1", mpu:"True", 
endscreen_module:"http://s.ytimg.com/yt/swf/endscreen-vfl181412.swf", 
cust_gender:"1", 
cc_playback_settings_url:"http://youtube.com/account#playback/captions", 
tts_watch_url:"/watch_ajax?action_get_caption_track_all&v=Zn5UYputoao", 
t:"vjVQa1PpcFPlssr_gqqgYS1iQNKjr4XZSrnFdfJoF0Y=", fexp:"907003", 
creator:"AmazingPhil", allow_embed:"1", 
fmt_stream_map:"35|http://v2.lscache8.c.youtube.com/videoplayback?ip=0.0.0.0&spa
rams=id%2Cexpire%2Cip%2Cipbits%2Citag%2Calgorithm%2Cburst%2Cfactor%2Coc%3AU0dXRl
NMV19FSkNNN19LRkFD&fexp=907003&algorithm=throttle-factor&itag=35&ipbits=0&burst=
40&sver=3&expire=1281319200&key=yt1&signature=13792B4A2F802D44B03B00BDD5A7C09C67
C7ACEF.53A66B39CFBAB02FAAEC6C6BF36ACAFEC71595F0&factor=1.25&id=667e54629bada1aa|
|tc.v2.cache8.c.youtube.com,34|http://v24.lscache5.c.youtube.com/videoplayback?i
p=0.0.0.0&sparams=id%2Cexpire%2Cip%2Cipbits%2Citag%2Calgorithm%2Cburst%2Cfactor%
2Coc%3AU0dXRlNMV19FSkNNN19LRkFD&fexp=907003&algorithm=throttle-factor&itag=34&ip
bits=0&burst=40&sver=3&expire=1281319200&key=yt1&signature=8EFC9B838CE9B5BF74AD7
126613F481C7BDC544F.3469ABA170CAA6F0C7D173D2E3BF9A5D7CDC1E67&factor=1.25&id=667e
54629bada1aa||tc.v24.cache5.c.youtube.com,5|http://v21.lscache7.c.youtube.com/vi
deoplayback?ip=0.0.0.0&sparams=id%2Cexpire%2Cip%2Cipbits%2Citag%2Calgorithm%2Cbu
rst%2Cfactor%2Coc%3AU0dXRlNMV19FSkNNN19LRkFD&fexp=907003&algorithm=throttle-fact
or&itag=5&ipbits=0&burst=40&sver=3&expire=1281319200&key=yt1&signature=D2ED0AB69
ED49A4D8CD7E9BE1B5589462BF8B0DE.72BFA1F62A1A5A75A1DB184E55DAB5188C2CF8BD&factor=
1.25&id=667e54629bada1aa||tc.v21.cache7.c.youtube.com", 
rec_key:"6553BF5543712B71-BEBBADA683CF2740", user_gender:"m", 
length_seconds:"33", enablejsapi:"1", 
iv_module:"http://s.ytimg.com/yt/swf/iv_module-vfl180701.swf", 
rec_title:"Re:+Which+Deadly+Animal+Are+You?!", 
rec_descr:"Video+Cam+Direct+Upload", dclk:"True", rec_categories:"15", 
enablecsi:"1", 
ttstrackurl:"/ajax_timedtext?videoId=Zn5UYputoao&type=track&session_token=DrKuSq
E7TjlnevvdO0rNiuv0Ayl8MTI4MTMxOTA4MA==&lang=en&name=", 
mpvid:"AASNVVEsp5oLfHIV", csi_page_type:"wwad", cr:"US", host_language:"en", 
iv3_module:"http://s.ytimg.com/yt/swf/iv3_module-vfl181412.swf", 
iv_load_policy:"1", cc_font:"Arial+Unicode+MS,+arial,+verdana,+_sans", 
video_recorder_module:"http://s.ytimg.com/yt/swf/video_recorder_module-vfl175721
.swf", cafe_experiment_id:"", 
watch_ajax_token:"Uc4VWXTlnyhhFiBiuNfi10mpPsd8MTI4MTM4Mzg4MA==", 
fmt_map:"35/854x480/9/0/115,34/640x360/9/0/115,5/320x240/7/0/0", hl:"en_US", 
rec_v:"Zn5UYputoao", cid:"1742", record:"1", 
ttsurl:"http://video.google.com/timedtext?sparams=caps%2Cexpire%2Cv&expire=12813
19200&caps=asr&key=yttt1&signature=13097EFCE7CD658B73938443163D4E5F91464D05.CD93
68818FC637A91527BEEACB535C764BC8D781", video_id:"Zn5UYputoao", cust_age:"1001", 
vq:"hd1080", cc_load_policy:"1", user_age:"23", plid:"AASNVVErod-y_ixX", 
afv:"True", 
ttslisturl:"/ajax_timedtext?videoId=Zn5UYputoao&type=list&session_token=DrKuSqE7
TjlnevvdO0rNiuv0Ayl8MTI4MTMxOTA4MA==", 
cc_module:"http://s.ytimg.com/yt/swf/subtitle_module-vfl175721.swf", 
sk:"Lvbe-lEq695TgYKreZNQpJmQVHLwIRjkR", color1:"000000", color2:"FFFFFF", 
autoplay:"1"}, ver:"1.1.8", ua:"Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; 
rv:1.9.2.8) Gecko/20100722 Firefox/3.6.8"})

If you can, provide any additional information below.
Original issue reported on code.google.com by johncast...@gmail.com on 8 Aug 2010 at 8:03
avindra / youtubehd

Download Link Not Working #78
