In the end, it looks and works great! I found the instructions a little outdated because the linked videos did not show Squarespace version 7.1, which I'm using. Unfortunately, I also had to pay more to upgrade to the Squarespace Business plan, so that I could inject the code. So at first I couldn't get it working, but the dev was very responsive to provide support and eventually fixed issues in the plugin code.

This plugin worked easily for desktop, but I am having trouble with it working on mobile. When I go to the page with the video, the video is just a frozen image and nothing is playing and sound is off. It won't play automatically like its doing on the desktop version. Is there an additional line of code needed for this to work the same on mobile as it does on desktop?

I urgently needed to have this plug in installed and never got a response from support. I am not a coder and but still worked it out and got it done myself. So can only give a 3 star as the plugin is perfect and works great, support just wasn't there. Thanks