Beta available for 6 Plus?

I came across a YouTube video showing that showed how to download the iOS 14 (or iOS 13) Beta Software from Apple.com if you have iPhone 6 or 6 Plus.

I tried it out and it downloaded perfectly to my device after I enrolled my device (which I didn't expect to work given that my phone is outdated). My question is, should I install this or will it destroy my phone completely? The thing that gets me is it's directly from the Apple Beta Program website. I've always used the Public Betas on my iPad and have never had any issues with data loss or system malfunction. I just wanted to be sure before I pressed install that this is safe to do on this device.
I saw the same video but didn’t work for my iPhone 6 Plus it’s only in the profile

Oii

Beta available for 6 Plus?
 
 
Q