Using a computer for video editing with smaller videos, especially if they are not in 4K resolution, is definitely doable. However, the specific requirements for your video editing computer can vary depending on the complexity of your projects and your desired editing speed.
For smaller videos, a mid-range or even a high-end consumer-grade computer with a decent multicore processor (e.g., Intel Core i7 or AMD Ryzen 7), a dedicated graphics card (e.g., NVIDIA GeForce GTX 1660 or AMD Radeon RX 5700), and 16GB to 32GB of RAM should suffice for basic video editing tasks. Make sure you have ample storage space (SSD for faster performance is preferable) to store your video files and a large enough monitor with good color accuracy for precise editing.