i Have an osmo, with 2 days worth of shoots. On the sd card(well i shot them with the sd card) with only a half of one shot on the card, but i can see the rest of that last shoot as well as the the day before in the cache video on the app.  Can anyone tell me whats going on and if i can retrieve the 4k videos?

I'm so sorry to read on this, may I know the type of your SD card? Is it stock one? Have you tried another SD card to see if the issue persists? Unfortunately, there is no official way to recover the lost footage in SD card. I apologize for the trouble caused.

it was the stock card, i can see the footage in cache form through the app but thats it.