But it's programmed not to climb something or jump over onto another room. It's all just a small (3 by 3 meters, like) open space, so nowhere to hide something. The robot itself is less than 10cm tall and doesn't have any arm. I considered some expensive robot cleaners of European brands and LG but the US$300 one I ordered seemed to do the basic things at a much lower cost. Also, the maker's name Yoo-Jin is my daughter's name as well, minor coincidence.
To answer the starting post's question directly, I burn DVD disks in LG, Pioneer, BenQ, Lite-On, Samsung, Plextor, NEC... and other maker's drives and usually burn either AVI files or DVD or HD files. The HD files are largest. Band of Brothers in HD easily require about over 20 DVD disks. KBS of South Korea has a documentary program called "KBS History Special" broadcasted in HD. 100 * 60 minutes. 1TB so over 200 DVD disks. These days, because I'm raising a 15-month-old daughter, I spend more time in thinking about the history, than remote issues discussed in future studies so I collect as many documentary HD programs, mostly history, geography, archeology, space science, biology, health, etc. Also from BBC, National Geographic, NHK...
I rarely rip DVD titles to HDD and also rarely compress DVD dual-layer to fit single-layer blank DVD disks. If I wanted to burn to single layer disks, I usually don't have to do it myself because I have enough friends and fellow forum members that do it. If I wanted to watch DVD titles, I prefer watching DVD dual layer on HDDs.
About video quality: If I wanted better quality, I prefer HD in 1920*1080, not further compressed to MPEG-4 or WMV. If I wanted smaller size sacricifing some quality, I prefer DVD-ripped and DivX-encoded AVI files of 700MB size to fit one CD-R per title. Not sure why but PowerDVD (of recent versions) seems to play HD better than VideoLAN 0.82, maybe something in PowerDVD's default preference setting is more opminized for smooth HD playback.