3D modeling for Video on Website.

We need to create a video for our website that will show 4 components that are grouped together interact with 3 additional components one at a time. I can provide the STL files for all of the items. We need someone that can show 4 of the items “coming together” and then that “group” engaging the 3 additional items. The output files needs to be exported for multiple formats/ ratios to be used on websites and social media.
Once I am able to look at the designers portfolio showing similar projects then I can go into more detail and share the stl files.