Here I'll show you the steps of DVD burning. 1  Add videos to DVD Burner. 2  After loading source video files, you could select subtitles and audio tracks from source videos, play back videos, etc. 3  Set disc menu (optional). 4  DVD burning settings.
Woodworkbykirk is right. I would go with the 11.25'' treads if you have the horizontal space, and a landing would be ideal. Australian code requires a maximum of 18 straight risers before you need a landing at least 4' in length, but I consider this extreme if you have room for an intermediate landing.
DHHS states that the average number of stairs in a flight is 12. http://www.dhhs.nh.gov/dphs/nhp/worksite/documents/calories.pdf It can vary, but is also limited by building code. Generally speaking you won't see more than 14 steps in a flight which refers to the straight section of stairs between two landings (I'm sure there are exceptions).