When I said successful online stores it don't mean dropshipping stores that are not revealing. Search any product in Google, you will see thousand of online stores selling the product. These are the online stores I mean.
But to bachdim54, I advise you to not copy/paste those descriptions 100% ... but to change the words and sentence order a bit or Google will penalise you for having duplicate content. (be lower in search result ranking)
Many Aliexpress products have videos in the sellers listing that you can download and re-upload to Youtube (I wouldn't link to them or anything on ALiexpress) ... as for other videos from elsewhere, I edit them, insert slide shows of pics into them, put a new soundtrack on them etc. Or some I just link to them. I've never had any copyright infringement problems, and if I did, they would simply ask me to remove the video ... which I would. No drama. (But it hasn't happened yet)
If you don't want to be penalised by Google for duplicate content and your customers scared off by shoddy Chinese English ... write your own descriptions and rewrite those ridiculously long titles. This is all covered in help.alidropship.com and the blog section ... as well as being common sense.
I just keep the sizes/dimensions/material info and delete everything else ... and write my own description.