Image sequence support was added mainly to support the output of 3D rendering tools, there image sequences make sense since it might take quite a while to calculate just a single image of a render sequence. (that sadly has not really changed, especially if you need to visualize new developed rendering&co methods)
If video import and export would usually take minutes per frame Hybrid would probably just support image sequences.
Hybrid does not support DVD output since:
a. I have no clue how to properly calculate the overheads for vob files
b. I don't know any really good open source MPEG-2 encoder (only free cross-platform MPEG-2 encoder I'm aware of is the one in FFmpeg, I had hope for x262, but that one turned into a dead project)
c. I haven't created DVDs since before I started writing Hybrid.
d. my knowledge about DVD structures (especially menu structures) is really minimal
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Also calling something like:
ffmpeg -i "path to video" -f image2 -vcodec png "E:\Output\%06d.png"
seems to be easy enough that folks can do it themselves.
Cu Selur