Then you will always fall short. Quality videos with content that relate to the viewers are what you need to make.
Take for example someone doing well in your niche 'Seananners'. When he first started out he just recorded pretty much all his game play then edited accordingly to show his best plays on the likes of games such as World at War etc. The main thing you need is a constant stream of footage, you say you dont have time to make the videos but have time to play games I imagine? Why not just set to constantly record with something like Shadowplay on the Geforce experience, or fraps and just build up a decent bank of footage each week to do some short 5-10min videos on? The top channels you will notice seem to flit between the same games, this is because they have a large bank of footage from a few days gaming then stretch it over weeks even months of uploads.