I don't have much of an opinion but that wasn't a good analysis and certainly not one that someone should use to back up his opinion in this discussion... What the guy in the video did is something you can do for every single player in the NHL, every player has good shifts and bad ones and especially defensemen will always lose battles from time to time or will be in the wrong position to stop a pass, that's just the nature of the game. At the end of the day a video like this is meaningless in my opinion because it's just way too easy to cherry-pick sequences so that they fit your view, not even to mention that there were a bunch of clips in there where the guy put way more blame on Franson than he deserved imho.
Of course Franson has weaknesses and he certainly doesn't seem to be a great defensive player, but that's just how things go in free agency, these are the only players you will get at a somewhat reasonable price or term, especially as a team that can't offer a player a very good chance at a cup. I'm really surprised how picky some people already are even though our defense is in dire need of some improvements at the moment. Outside of maybe one or two guys our defense is full of question marks at this point, with pretty much everyone either coming back from an injury, being young and unproven or not having a higher ceiling than that of a bottom-pairing defenseman. A guy like Franson, despite all his flaws, would still be an improvement over almost all of these guys.