I've used this method for looping video and I can tell you that this does not work as well as you think. Unless the movement in the video is minimal, you will see an abrupt change when you reverse the video. Also, since the last frame will repeat itself, the video will appear to hesitate since that frame will play twice.
I have a video which is fairly 'disparate' with its animation - I won't notice that it has reversed (I think ) I'll go to a video editing software - as you say, if it doesn't work very well in most cases then no reason for Deskscapes to include it. Thanks for the on topic reply.