It is more convenient to learn to draw sound and shadow. There are many other majors, but there is no need to use them. . Video blur is because your video resolution setting or material resolution has nothing to do with the software. . .

As for the file format, it depends on which computer screen you plugged in at that time. Generally speaking, the format of AVI MP4 MPG MOV is acceptable. The key to this is to ensure that the computer plugged into the big screen can play, and that computer can play on the big screen.