Quality videos can be shot on both—but Canon typically has a smoother autofocus and offers lenses specifically for cinema. When choosing between camera brands, it's best to compare each camera individually—where Nikon may have a better entry-level DSLR, Canon may have a better DSLR for sports.

SLR (Single Lens Reflex) is an old form of cameras which use film to form images. SLR cameras offer slightly better quality of color, tone and contrast. DSLR (Digital Single Lens Reflex) refers to SLR cameras that take digital photos. ... There are more DSLRs available in the market so they tend to be cheaper.

For 95% of photographers (both amateurs and professionals), a DSLR camera is worth a buy but only if they have a profitable photography business. While for people that just enjoy photography as a hobby it is not worth it at all.