Since your video is 240p, it is quite low resolution, which is great for small file sizes but may look blurry on large screens.
If you need the piece to loop, this is usually handled by the video player, not the editing tool.
To create a "piece" (a shorter, edited clip) from your 0h3q3sj64ldu2p98zbshg_240p.mp4 file, you can use several free online tools to trim, split, or edit the video. Here are the best ways to create your piece: Top Online Video Splitters & Editors
(e.g., sharing on social media, making a GIF, creating a loop?) Which section of the video do you want to keep? Do you need to reduce the file size further?