The advice I've always heard is that if you can do it yourself, it's always better. Animals can't tell you that they're sick, so every bit of info you can get on how they're doing is important. Having the machine automatically clean the litter box deprives you of that option.

With that being said, a clean litterbox is also really important. I plan on getting a couple of cats in the next 5 years after I've gotten my shit together (cats and incredibly messy houses don't mix), and I will probably get an automatic litter box because I don't want my depressive episodes to result in my cats being miserable. As this post shows, you should do your research. Find a litter box that has been endorsed by multiple unrelated reviewers if possible. Some of these boxes are dangerous, and many of them are kinda worthless.

The video in the OP was recommended to me a few days ago and was my introduction to this whole fiasco. This person has done a ton of reviews and has a couple of boxes he'd recommend.

EDIT: I literally linked to the video in the OP... I thought it was the video from one of the people who had a cat die.