That's a very good question! (Which is business-speak for "I have no idea") - posting all under one account rather than multiple personal ones would definitely keep the watchers from having to subscribe to a heap of channels. I hadn't really thought ahead to what my lack of involvement would imply :)
The Hatoful sessions I recorded with Camstudio 2 were, for hour-long videos, about 3GB each when you add up the size of the video (about 1.5GB) and the two audio recordings (750MB each). However, it depends on the codec you use - FRAPS doesn't use a compressor at all and so a five-minute video can be about 1GB, depending on the screen size, but this comes at the advantage of only minimally affecting the game speed (you can compress the video later). I would say you definitely need a dedicated partition of about 500GB to do it - I took an external hard drive apart and just installed that :)
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The Hatoful sessions I recorded with Camstudio 2 were, for hour-long videos, about 3GB each when you add up the size of the video (about 1.5GB) and the two audio recordings (750MB each). However, it depends on the codec you use - FRAPS doesn't use a compressor at all and so a five-minute video can be about 1GB, depending on the screen size, but this comes at the advantage of only minimally affecting the game speed (you can compress the video later). I would say you definitely need a dedicated partition of about 500GB to do it - I took an external hard drive apart and just installed that :)