You are very definitely can. Though this is preferable to just duplicating someone else’s video, there is still a chance of the video’s original author contacting you and claiming copyright or requesting you to remove the video.
It is YOUR duty to ensure that the clips in your videos are appropriate for usage. Viral Ecom Adz only edits videos for you. It is entirely up to you if you believe they are appropriate for your marketing platforms. If you don’t think the video is usable, Viral Ecom Adz will provide you with a free edit within 24 hours of getting it.