Full screen

Hello, I have a problem with WordPress. I use the tutor lms pro add-on, but I have a problem where when the student plays the video on the course’s mobile, it appears in full-screen mode, and this is what causes me to lose parts of the video. Can I disable the full-screen zoom mode? That is, it is not a problem if black edges appear on the right and left. Can you provide a code to solve this problem? Thank you

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