Some standard editors like Adobe Premiere can struggle with specific MP4 encodings, leading to blank screens during export.
If the video won't open, try using the VLC Media Player which has a built-in "repair" feature for broken MP4 containers. vdo 1(1).mp4
If you want a critique of the video’s (e.g., for a film school application, a YouTube channel, or a portfolio), I can provide a detailed analysis if you describe: Some standard editors like Adobe Premiere can struggle
For high quality on most platforms, aim for an H.264 or HEVC codec at a high bitrate. for a film school application