How can I add supplier videos to my own YouTube channel?

[Nickahola]

Hello all.

I am now at the stage of my store https://www.silvercirclepets.co.uk of creating backlinks. 

I’d like to add a video from my suppliers’ products to YouTube to create this backlink.

I’ve added a couple already as I was able to download the video file. However, the rest are already YouTube videos.

Just wondered if there was an app of some sort that can allow me to add the videos to my own channel? 

Thanks

Nick