As this video put together by a group of Ukrainian journalists explains, most Ukrainians are just tired of a corrupt government and poor living standards, and that is what led them to protest.
宾语动词是explains吧？？
主语是哪一部分？
a group
要么是
As this video put together by a group of Ukrainian journalists
？？？
不熟悉这种说法

读着感觉是这样的 翻译得很生硬 应该是这样

主句是as this video explains,中间那句是从句，省去了which is.