I just installed this on my Galaxy S23 Ultra. The first one had bubbles, so I tried the second one. For the second one, when I used the scraper (starting at 1:24 in the video), I went very slowly from the bottom to the top of the phone. I had no bubbles by going slowly. I don't know if this will work for everyone, but I wanted to share. Also, the screen protector struggled to recognize my fingerprints. I redid my fingerprints in the security settings, and it works flawlessly now. I hope this helps someone.
