Clideo

Clideo is a tool that can increase the resolution of your video online. You don't need to download, just access it via the https://clideo.com site. After that, upload the video that you want to fix there.

There are various tools that you can use. Starting from resizing, sharpening, brightness, saturation, contrast, and so on. You can also change the video format through it. This site is perfect for beginners.