When I try to import my videos, they come in and play, but they don't play the sound. They are Quicktime, .mov, videos. I had to download Quicktime to get them to play in Movie Studio 2022. They play and the effect I wanted worked, but no sound.
This is on a new Windows 11, i7, 32 gig RAM laptop
Movie Studio 2022 is, essentially, Movie Edit Pro under a different name so I will move your post to the correct area of the forum.
If you do a search in the forum for the problem of "movies importing without audio" you will find a number of threads on this. However, to help you we actually need rather more information about the actual video files. Please post here the results from the Text view of the analysis of one of your files by MediaInfo. If you're not sure exactly what that means or how to do it, please read and follow this tutorial.