With Vidmore Video Enhancer, you could upscale the low resolution of your videos to high resolution, remove the video noise or enhance your videos by adjusting brightness/contrast/saturation/hue, etc. It is also able to rotate/crop/trim/merge your videos or add watermark to videos.
4k Video Downloader - 4K Video Downloader is a software program that helps people download video files from sites such as Facebook, YouTube and Dailymotion.
HandBrake - HandBrake allows users to easily convert video files into a wide variety of different formats.
Youtube Video and Audio Downloader - Download YouTube videos in all available formats and extract the original audio files.
Aiseesoft Video Converter Ultimate - Aiseesoft Video Converter Ultimate is professional and powerful video software to enhance video, convert videos/DVDs and videos
youtube-dl-gui - A cross platform front-end GUI of the popular youtube-dl written in wxPython.
Format Factory - Format Factory is software that allows the user to convert media into various file formats. The software is a product of PC Free Time, a Chinese software development company. Read more about Format Factory.