I think it's possible to look at the video file and find markers for modification. Certainly this is the case for JPEG, TIFF, PSD, vs Raw files. It's not impossible but very impractical to render a Raw file, edit it, and then unrender it back into a Raw file. It's also pretty malicious and I think it would show a corrupt intent to modify a Raw image in this manner.

There are Raw equivalents for video, but consumer cameras are all post rendered, and heavily compressed. So modification is going to change all kinds of metadata, but in particular there will be more than the expected quantization from double compression.

Again, if that were demonstrated, I think it would show a corrupt intent. The intent to deceive.