Visit go.videoremix.io and click Template Generator, see below:
This will load up the video collection and you can do a few things:
Search through using niche names like Pets, Restaurant, Car, Plumber. e.t.c. or scroll through to make a choice.
Hover your mouse on the videos to preview them, click the play button
Click the use button on a video of choice to proceed
Select Niche scripts that go with your choice of video
The editor will open op with the video and niche scripts pre-populated on it. You can edit the text and replace images or change the base video to suit your need.
Click Publish & Share to save changes when you are done.