Convert video with ffmpeg

ffmpeg -i <input> -filter:v fps=30 -b:v 64k <output>
ffmpeg -i E0406988.mp4 -filter:v fps=30 -b:v 64k E0406988-conv.mp4
ffmpeg -i st2334-finals.mp4 -filter:v fps=30 -b:v 64k ST2334_A0200007H.mp4
ffmpeg -i st2334-quiz4.mp4 -filter:v fps=30 -b:v 64k st2334-q4.mp4