I'm looking for something like the one in the video. If anyone can give leads on where to buy it, I'd be grateful. I saw an ad on Sulit but it couldn't hurt to have alternatives.

SLIDE back sliding door closer - Installation - YouTube

Note: No need to mention the many DIYs involving weights and a pulley. It might be suitable with patio doors but I don't think it will go very well with the interior of my home. In which case, I think a proper sliding door closer is more appropriate.