Dougatec Encoder

This application can batch convert video files based on specified settings and presets. You can also batch convert files with "specified character + sequential number" file names. It is free software that is free to use.
Presets are available for high resolution, low resolution, high quality, YouTube, Facebook, Twitter, Instagram, and TikTok. Each also has horizontal, vertical, and square ratios. There are also custom presets to save various settings.
Video codecs supported are H.254, H.265, HEVC, MPEG-2, MPEG-4, VP8, VP9, and ProRes. Supported audio codecs are aac, mp3, vorbis, opus, flac, wma, dts, and pcm.
File names can be converted in a batch using specified characters + sequential numbers.