What are you using for these videos? I will be getting a Hauppauge which does 1080 and if I remember Live for You! does 1080 while iDOLM@STER does 720 only.
I think your videos look fine, better than what I did.
He's probably using a Hauppague HD PVR, which I'm getting in 3 days (well, it's mostly for work, but I will also use it to do some personnal reviews).
I don't know what Hauppauge you're talking about, but if it's the HD PVR one, it does 1080i, not 1080p (which is very sad). And interlaced sucks. So you'd better be recording in 720p too
Some capture devices do 1080p, such as the Matrix Mini Max 2 (or something like this), Black Magic Shuttle (but you have to have a USB 3.0) and Black Magic Intensity, which is internal.
The other ones are way too expensive for a non-professional use.
For the time being, the Hauppauge HD PVR definitely is the best choice, as long as you can afford it (180 euros / 240 USD)