Soon after making my last post, I found the video URL:
Code:
http://o-o---preferred---ord12s12---v22---lscache8.c.youtube.com/videoplayback?upn=Epc9q7GN7Wc&sparams=cp,id,ip,ipbits,itag,ratebypass,source,upn,expire&fexp=900210,914053,910104,900222,915507,907217,907335,921602,922600,919804,920704,924500,906831,924700,913547,920706,924402,907344,912706,902518&ms=au&itag=37&ipbits=8&signature=150EBE5810B9DADA1DCFB1253E525FA90013DD0B.36A3EA92BDD8747DE995CC8EE5E35379F6262B2C&mv=m&sver=3&mt=1343060659&ratebypass=yes&source=youtube&expire=1343084356&key=yt1&ip=99.128.18.254&cp=U0hTSFBTUl9KUENOM19ITVZEOkNYOExUSmhJR1Vx&id=4c51ad8962b2d539
Looks like I may have to modify my scripts to look for a fallback video source -- if it exists -- when the initial video file source is corrupt or unavailable. I'll keep you guys posted, and issue a fix here when it becomes available.