c# Priamy link na youtube video

potreboval by som z klasického youtube linku

www.youtube.com/watch?v=0aZgFyLQgHc

dostať priamy link na .flv video:

http://v12.lscache6.c.youtube.com/videoplayback?ip=0.0.0.0&sparams=id%2Cexpire%2Cip%2Cipbits%2Citag%2Cburst%2Cfactor&itag=5&ipbits=0&signature=B131141F8658D751D4F24DD428282A16D5305F94.1AEBE4F1CF0E2D236666D6EC83B9A89A68E4BA64&sver=3&expire=1253390400&key=yt1&factor=1.25&burst=40&id=d1a6601722d08077&fmt_map=18/512000/9/0/115

alebo .mp4 video:

http://v17.lscache2.c.youtube.com/videoplayback?ip=0.0.0.0&sparams=id%2Cexpire%2Cip%2Cipbits%2Citag%2Cburst%2Cfactor&itag=18&ipbits=0&signature=1C16EF80343E29B763842BE39A16EA0F55337CA5.7A548E6C7894E1199E6DD9B2DF0C26514695C818&sver=3&expire=1253390400&key=yt1&factor=1.25&burst=40&id=d1a6601722d08077

pretože chcem prehrávať youtube videá priamo z windows aplikácie, neviete mi poradiť ako na to?