I wasn't aware of those games, but I've asked on the SB Facebook group. Harald Berg, the waiter who scored against United, is well known. He went on to play professionally in Holland. Three of his sons were top class players and his grandson Patrick Berg is a current international for Norway. Andreas Morisbak went on to do coaching and is well known for writing books about football coaching. One of the Scandinavian Blades will know him well. Kolle and Stavrum later hads sons playing professionally.
On Brann's site the match against Sheffield United is mentioned as a highlight of the season. A crowd of 14000 saw club hero Roald "Kniksen" Jensen make a guest appearance and score. At the time he was a Hearts-player. He was a big hero in Brann, and there's a statue of him outside their home ground. He died just aged 44.