Complex sentence: Since 1996, he has also collaborated with Radiohead frontman Thom Yorke and others on the band's websites, and appeared in the occasional band webcast and the 2001 Grammy Award ceremony.
Split into simpler sentences: Since 1996, he has also collaborated with Radiohead frontman Thom Yorke and others on the band's websites. He has, however, appeared in the occasional band webcast and the 2001 Grammy Award ceremony.