fmpeg -ss 30 -i video-2015.mp4 -vf scale='iw/2':-1 -c:v libx264 -c:a libfdk_aac video-2015-opt.mp4
`ffmpeg -i video.mp4 -c:v libvpx -b:v 1M -c:a libvorbis video.webm``
git archive --output=<folder_name> HEAD $(git diff --name-only <commit_hash>)
git tag -d <tag_name>
git push origin :refs/tags/<tag_name>