I am VERY new to this and not trying to do anything fancy at all. Still having issues and am embarrassed to ask, but I've tried my best to solve the problem and I can't figure it out.

I am trying to put all of my iPhone videos in one project, 90s family movie style. I can build a simple timeline and make it all work, but I've found that the videos that were taken vertically (there aren't many, but still a few) turn out extremely blurry.

The project is set to a 16:9 aspect ratio and those videos that were filmed in that aspect ratio are fine, but when I add 9:16 videos to the timeline the quality of those clips seriously degrades.

When I start a new project in 9:16 and add those videos, the quality is fine.

I would really like all of my clips (16:9 and 9:16) in one project without compromising the quality but I'm not sure how to do it. I'm fine with having the black bars on the side of the clip, I'd prefer not to have the blurred out larger version playing to the sides.

Can anyone help a complete beginner solve what is likely a simple problem?

Thank you!


EDIT: I guess to clarify - when I put the clip into the media library, it's fine and plays well and normally. The second I move it onto the timeline it asks me to change the project aspect ratio from 16:9 to 9:16. I say no, because I want the overall project to be 16:9 just with some vertically filmed videos, and then when I play the video from the timeline, it's terrible.

Really don't know what I'm doing wrong - I feel like this is something people do all the time? There must be a simple fix I'm just not getting.

Thanks for taking pity on me......


EDIT AGAIN: I should also make it clear that I produced the video and it had the same problem. It's not a problem with the preview window, the videos are blurry in the final, produced version as well.