t bird is a brazilian sparta remixer. He has been on Youtube since January 2009 with different accounts, with Thunderbirds360TV being the longest and the most successful channel alive, created in November 2011. He used to make Downfall Parodies during 2012 and 2013, therefore making him an unterganger.
Originally made a couple of Sparta Remixes between June and November 2012, however he stopped and started again in May 2013. Other than a hiatus in 2014-2015, he's been active until early 2016, announcing his retirement, after stating that he was "sick of the 'community", until later on in 2017 when he announced his return for video making.