Wire _attach_sponsorblock to also fire when delegating to pv.youtube.
xbmc.Player() is a global accessor so our monitor's getTime() /
seekTime() / isPlaying() work regardless of which addon initiated the
playback. Result: HD via pv.youtube's MPD + our SponsorBlock skips.
Verified: played LTT 2T8x5antlnc via delegation, seeked to 1:45, our
monitor detected the 1:48-2:08 sponsor segment, called seekTime(128.4),
log line '[torttube] sponsorblock skip: sponsor 108.3-128.4 (20s)'.
Position landed at 2:17 (post-skip natural playback).
Kayos
365badd502