Unable to import mp4 1080p video from pixel 9 pro

I’m a total newb to this, so please ignore my lack of knowledge. I created 1080p video on Pixel 9 Pro, and I can view the videos with no problem in Windows Media player on W10 Pro, but when trying to import the videos into RS, I receive the error: No suitable transform was found to encode or decode the content.
I do not doubt that this is a codec issue or something of the sort, but the only post I’ve been able to uncover is referencing 8k video and I’m not even shooting in 4k. I could just use some guidance on where to begin please.