SVG can be edited in Illustrator, but you have to understand that he had the nature of the origin and all the other gadgets Illustrator on the type of filters you will not see in the same form. It will be more property and changed the effect. In turn, the effects in the scg can also be distorted when opened in Illustrator or even lost (about the animation is generally silent). If svg was a shadow in Illustrator it can be a picture. Depends on how the svg was made.
As already written, the svg itself looks as text. Therefore, the data in it is sometimes even possible to understand.
Here are the weirdo one interesting vidosik was: https://youtu.be/XBdbgD2BaEI