FAKE AND CRIMINAL: DO NOT DOWNLOAD!!!!!
That plugin does not download a video!
It forces you to download and install other software. Don't be so stupid to install such a strange software.
Even if you do: This software will download a video. But those videos are not useable at all because of a big watermark inside. They want you to pay t oget rid of it.
All positiv comments sound very similar, like botgenerated or bought.
Don't waste your time and don't risk maleware!