I took a look at the video.....and here's MY 'opinion'......
Whistle / Handling. No goal. The arm began in an elevated position, with the hand near shoulder level......IMHO, an unnecessary position position given the fact the player didn't jump THAT high off the ground. More importantly.....MOST importantly......the arm moved downward & caused the contact with the ball. "Intent" is derived from what we SEE happen.....a player's arms go where the mind tells them to; the arm doesn't act independently......thus the very act of 'handling' (a verb indicating action) at the least implies 'intent'. This is contrary to a ball striking the limb, that is both not moving AND in a more natural position, one where the player is not "making themselves' bigger' (the more recent wording from FIFA).
It should be noted that whether the ball/hand contact 'benefitted' the player has NEVER been a consideration for ruling said contact 'handling'. That's one of 'The Old Wive's Tales" of soccer.......right next to "I got the ball first!" & "The Throw-In has spin on it!".
Lastly......many, if not most, infraction calls are "In The Opinion Of The Referee", and frequently "Opinions Vary", among a number of other factors that affect how we evaluate what we see, IF we in fact SEE it.....