I find it very difficult to discover a player with similar abilities in today's transfer market. Sure he has to learn a thing or two especially in terms 'off the ball', but that's doable, i guess. Experience will help. Just to name a few of his traits:
strong build
age
technique
dribbling
vision
shooting ability
character
image
Mixed together gives you a yummy cocktail, imo. I've seen Pogba play against Bayern last season and he looked very good to me, Bayern are no newbies! He stood up against one of the best midfields in the world, don't think a vine player could do that. I thought he was a so-called vine player once, but i've made up my mind.
United are fed up with taking too many risks and Pogba seems like the safest bet you can get. Important member of a serial league winning team, CL finalist, Euros finalist, all of that at the age of 23.
As you've already mentioned, the video focuses on the money thing, because according to a lot of people Pogba is already widely regarded as a wordclass 'talent'. Juve don't want to sell him, the offer has to be astronomical, United clearly want to get their hands on him at almost any cost and other teams are also sniffing around.
It's not only about what Pogba will cost, no, it's also about what he might bring in. The attention Pogba gets from all around the world his huge and he will most likely become the face of the club in the near future. That drives the price up! Adding inflation to it, about 50 mil. might have done the trick for Modric, but because of his image, definitely not for Pogba. Financial forecast is looking alright!
You have to take these kind of things also into account. The 100 mil. you're forced to pay for this guy who's off the field popular af, will play its part concerning the future turnovers.
At the end of the day Pogba will make United a better team. Success looks more likely with him in the team than otherwise. He's the lost son who wants to come home, how many of these spoiled stars really like it in Manchester?!
Is it really worth the hassle is a choice of personal preference, for me he definitely is, for you not. That's the beauty of football: opinions. We'll see how it goes, if he comes... as always.