Images should definitely import correctly into objects, characters, interfaces, animations, etc. If you have set the default game resolution to 1920x1080 & are importing the images with a canvas size of 1920x1080 then that's what they should display as. VS does not adjust the scale of images imported into the VS editor. It only scales things up/down from the default game resolution when the game is running to match the display device/window resolution while retaining aspect ratio.
If you were to import an image as a scene background that is higher &/or wider than the default game resolution then it would automatically turn the scene into a scrollable scene type.
As for the video component issue, I haven't heard anyone else report anything about it, but I suppose it could be a bug introduced in the recent VS update...
Could you provide any screenshots or video recordings of the issue?