SmokeyCriminal
Explorer
The video game genre of RPG is recognized by the degree to which it resembles classic D&D. It's defined by its mechanics. The class and level system, HP, spell slots, random encounters, and abstract turn-based combat are the foundations of the genre. The further you get away from those things, the less the game is even recognizable as an RPG.
I guess you could put out a video game that was based on the D&D setting but wasn't even an RPG, but that seems like it would have all the same problems of the D&D movies. The setting, in as much as you can say that D&D even has a setting, isn't nearly as exciting is the mechanics which are used to describe that setting.
I think your right that it would have some of the same hurdles as the movies, mainly the script and acting.
If the script of the interactive video game is as bad as the movies then the game is dead in the water. But the game wouldn't have hollywood executives picking and changing the script to be "safer" or whatever, video game stories have a freedom that movies just don't.
And acting isn't an issue because its replaced by voice over, which is in fact kind of a trump card for D&D right now, Because it just so happens that one of the biggest and post popular D&D campaign is played by a pack of some of the most talented voice actors. Imagine having everyone from Critical Role do voice over for the next Telltale/Life is Strange video game, which im pretty sure half the cast has done Telltale, and Ashley Burch was the voice of Chloe in Life is Strange and shes been on Critical Role like 3 times now. Plus, since its voice over, you can get Aquisitions Inc members in the mix. The fact that its a game and not a movie means you can have people that are associated with D&D without the limitations a movie has, you can Jerry, Scott, Patrick and Mike play Large handsome Warriors or goblins or old ladies or whatever, something you can never do in a movie.
And aside from all the obvious things a game can do more easily that a movie can't budget wise, is the Interactivity which a movie can not do at all. And the fact that you don't have to squeeze characters, their arcs, back stories, and world building into two hours.
And you can even make it Episodic which does annoy people to some extent but also mirrors D&D perfectly. every D&D session ends with a reveal/cliff hanger and the table goes "awwh WHAT?!? really?!?! come on?!?!" then they spend the next week talking to each other speculating what everything might mean, coming up with theories, listening to and enjoying other players theories and predictions. Which is exactly what happens with Telltale and Life is Strange and i'd even argue that its a corner stone to playing those games and is in part what makes them so fun and popular.
Now i'm starting to think that maybe an Interactive story video game might be better then not only an RPG video game but also a movie lol