I put a video in After Effects CS6 and I didn't do anything to edit it. I rendered the video and the rendered video was slower and more delayed than the original. How do I increase the quality of my rendered video? Thanks!!!
The default rendering mode is lossless. Lossless format's are designed for production pipelines not for playback. If you want to learn about video you need to learn about codex and compression. I would study up. There is way too much to cover in a post.