Can't save QuickTime screen recordings
After using CMD + SHIFT + 5 or by opening QuickTime -> File -> New Screen Recording... and pressing record, even with very short, few-second recordings, once I click the button at the top bar to stop the recording, I see a dimmed/greyed out preview in the corner, it cannot be dragged into an application, and when attempting to open it by clicking on it, I get a Quicklook window with the prohibited play sign, as shown below.
Upon closing this window, I get the error: "Your screen recording can't be saved." With the description: "Error saving recording." (Incredibly helpful :/ ), which is also captured below.
I have tried restarting several times, messing with save location, etc. but I can't seem to make it work.
As evidenced by the fact that I'm attatching these screenshots below, the screenshot functions work, it's only the recordings that fail.
iMac 27″, macOS 12.5