ffmpeg

Encoding video for the web - https://gist.github.com/Vestride/278e13915894821e1d6f

Reduce video size (change CRF value to change size/quality of result video):

# H.264 codec
ffmpeg -i input.mp4 -vcodec libx264 -crf [18..24] output.mp4

# H.265 codec
ffmpeg -i input.mp4 -vcodec libx265 -crf [24..30] output.mp4