The terms RAW and JPEG aren't meaningful or applicable when it comes to video recording. 3. if you want the highest quality screen grabs use the highest quality video setting: You would be well served by taking the time to read the manual that came with your camera and maybe check out some YouTube videos.
In viewfinder shooting with [ : Dual Pixel RAW] set to [Enable], if you switch to Live View shooting while < > or < > drive mode is set, the < > drive mode will be set automatically. When you shoot RAW or RAW+JPEG images with [ : Dual Pixel RAW] set to [Enable], noise may be more noticeable compared with that in normal shooting.The main difference between any JPEG and RAW file is its size. RAW files are significantly bigger than JPEG (and any other) image file formats. That’s because they contain all the raw image information captured by your digital camera’s sensors, completely uncompressed. Like working with a film negative from a traditional camera, the RAW
My Canon CR2 + JPEG file pairs with 'Treat JPEG images next to raw images as separate images' checked look identical (i.e. they look the same). My guess in the case of Canon and Nikon camera raw + JPEG pairs LR uses the preview embedded in the raw file and not the JPEG file since they all embed a full-size preview. The only difference you might