I am new to DSLR video and wondering, how is actually working "Movie digital IS" stabilization of my Canon 800D. If you shoot video, there are 3 options of IS stabilization - no stabilization, IS stabilization, and IS enhanced stabilization. If i turn on IS stabilization, it looks like it crops the shot (with "IS enhanced" option even more).
So my question is, on what principle is this IS stabilization working and is it lowering the resolution of final shot?