Searching that part easily brings you to the guy's videos, where he only tells others asking about it to "please wait", and apparently it serves as both a charger, battery level indicator, and LED "light chaser"... an integrated powerbank IC is the only thing I can think of, and in his latest video he describes a "HX3786D" which I assume is
an HT3786D, although it's grossly miswired.
That and the sketchy nature of the work, along with previous experiences of the culture from which I am quite certain he is from, lead me to believe this might be a cheap attempt at getting video views for ad money by publishing very poor quality/misinformation --- if so, go ahead and downvote his videos. Hard to say whether it's truly a hoax, but I think it's pretty damn close.