Hello
I am editing videos using the VSE and I have found on export, blender crashes when it has to render VSE added text scenes where the text elements have NOT been converted to mesh. In short, if you create a 3D scene to create a title directly in a blender 3D scene, add it to the VSE timeline without having turned the text to mesh, the export render will probably crash after a few frames of rendering the scene.
I hope this helps someone
I just tested this and it works fine for me. What other things are going on in your scene? What render engine and do you have large textures etc? Could it be that your video card is out of memory?