The third split screen feature available on Apple's iPads, Picture in Picture, has not been added to the YouTube app despite being a feature that many YouTube users have been hoping for.
Split View is compatible with the iPad Air 2, both iPad Pros, and the iPad mini 4. Slide Over is compatible with the iPad Air and up, the iPad mini 2 and up, and both iPad Pros.
Other new features in the update include relocated home tabs when in landscape mode on an iPad and a fix for a bug that prevented URLs in video descriptions from opening.
YouTube can be downloaded from the App Store for free. [Direct Link]