No problem here for either url.
YouTube preferred resolution in BS.Player set to 1080p.
Tried for Pro version (under XP SP3),
Will also try for Free version.
@
Flesh: what version do you use ?
P.S.:
(Standard/preferred BS.Player's) filters used for both 'problematic' and non-problematic url:
Splitter: Haali media splitter 1.10.262.12
ffdshow Video Decoder 1.0.7.3135
MPA Decoder Filter (Mpeg Audio Decoder Gabest 1,0,0,4)
MS DirectSound (Quartz.dll)