Some systems had a BSAVE command that could be used to capture the area of memory where screen data was stored, but this required access to a BASIC prompt.
On Windows systems, screenshots of games and media players sometimes fail, resulting in a blank rectangle.
A common problem with video recordings is the action jumps, instead of flowing smoothly, due to low frame rate.
Though getting faster all the time, ordinary PCs are not yet fast enough to play videos and simultaneously capture them at professional frame rates, i.e. 30 frame/s.
Some companies believe the use of screenshots is an infringement of copyright on their program, as it is a derivative work of the widgets and other art created for the software.