I'm not sure on Top 10 videos, they do require a little bit more research, especially if you're going to compile key information about 10 different games (or 10 different features of a game) into a reasonable watch time. So this is the process I use for my newest series.
I recently started a series called "IndieChest" where I review smaller, less known Indie Games.
To do so I first get about 30 minutes to an hour of gameplay footage to use as B-Roll and Demonstrative Footage. This gives me some material to work with, and also gives me a chance to really get to know the games controls, how it feels and it's overall entertainment value. After doing this, I then write about 4-5 paragraphs explaining the game in depth, from it's engine, controls, gameplay, pro's and con's, etc.
After recording the audio for this, I then compile it all together in Premiere Pro and edit it accordingly. It takes a while to do these, and you might find some parts you want to change or edit later on, so it's easier to keep all your recording software open during the editing process. Here's a screenshot of the typical editing sequence.
I know this isn't EXACTLY what you asked about. But this pretty much explains the process of creating one of these kinds of videos.
If you've got any more technical questions, let me know.
