On the other hand, because I write them first, and narrate them afterwards, without just using footage and saying "here you can see XYZ", you can in theory download it as mp3 and listen to it as podcast
It's a fine line with prepared speech, when does the video content actually add something relevant to what is being said, and when does it come as a distraction? And on the other hand, it must be difficult to stitch relevant videos to the speech (or time the speech to the planned content).
In this review, it seems you have gone as far as timing the video, so that action or interesting NPC dialogs trigger on cue, just at the right moment. Did you spent a lot of time and effort just for the planning of the review, or is that good improvisation?
Regarding the format, I'm fine with videos if they actually show something, not so much when they repeat some random footage in a loop. I think it's easier for many people to just watch than read, actually, it's less straining perhaps? Text reviews are fine too, you can easily pick what you want as @vanedor; said. Note that it's possible to have chapters in the video, or pointers in the notes, to allow viewers to pick what they want (yes, more work!
).
Podcast on the other hand… I'm not sure. It feels a little weird to listen to something and not using the eyes, as we're used to getting most of the message through the vision channel (and we probably lost the habit of listening to the radio long ago).