refactor code
add workaround for SDK bug
add code to remove unpublished videos
fix alt downloader to only produce mp4
add missing height and width
add tags sorting
add a few channel wide tags
calculate size for claims missing in the database
fix reprocessing for videos no longer on youtube
pass metadata instead of hardcoding it
add video height when updating streams
add tags to channels
add test for tags
update lbry.go deps
rename LBRY_API env var as the SDK is now using it too
fix startup routine
replace ytdl library
add hardcoded support for khan academy
