Complex sentence: They released a series of Webisodes during this time, featuring footage from the recording sessions for the group's new album, while they also booked a tour of the UK and Ireland while they were added to the lineups of few European festivals.
Split into simpler sentences: They released a series of Webisodes during this time, featuring footage from the recording sessions for the group's new album. They booked a tour of the UK and Ireland and were added to the lineups of few European festivals.