The highest video resolution supported by the IXUS 285 HS is 1920 x 1080 pixels. That's over two times the video resolution of a 1280 x 720 pixels camera, which is the most frequently found video resolution supported by comparable spec cameras that are a similar age to the IXUS 285 HS. 1280 x 720 pixels is also supported by this Canon camera. In addition, this camera supports a video resolutions of 640 x 480 pixels. A video resolution of 1920 x 1080 pixels is equivalent to Full HD video. You will require a Full HD TV or better to appreciate this level of detail.
A 1920 x 1080 pixels video resolutions is actually the best supported video resolution across all compact cameras that came out around the same time as the IXUS 285 HS.
Across comparable types of camera the worst supported video resolution is 640 x 480 pixels.