How to find nico video flv

==How to find nico video flv==

http://www.nicovideo.jp/watch/1422709051
http://www.nicovideo.jp/watch/sm25473331

Take the last part of the address after the slash, and add it to: "http://flapi.nicovideo.jp/api/getflv/"

ie:
http://flapi.nicovideo.jp/api/getflv/sm25473331

and you get:
thread_id=1422771511&l=1090&url=http%3A%2F%2Fsmile-fnl21.nicovideo.jp%2Fsmile%3Fm%3D25473331.9381low&ms=http%3A%2F%2Fmsg.nicovideo.jp%2F20%2Fapi%2F&ms_sub=http%3A%2F%2Fsub.msg.nicovideo.jp%2F20%2Fapi%2F&user_id=22420902&is_premium=0&nickname=primadog&time=1440483827397&done=true&ng_rv=1&hms=hiroba.nicovideo.jp&hmsp=2580&hmst=560&hmstk=1440483887.fQ8Kedw6X_AI7Wa5d-uF8kCnpRs

Take the output between "&url" and "&ms=" and convert it back with a unicode cover:

Goto:
http://r12a.github.io/apps/conversion/

Put on the first cell
http%3A%2F%2Fsmile-fnl21.nicovideo.jp%2Fsmile%3Fm%3D25473331.9381low

Press convert, and you get:
http://smile-fnl21.nicovideo.jp/smile?m=25473331.9381low

That gives you a ddl link to the video's flv file.  Make sure you're login to nicovideo, if it doesn't work.