Peter VK3YE has put together a playlist for youtube for those looking for Bitx or uBitx videos. This saves you from sifting through hundreds of other videos.
Either select the one you want or sit back, press play and watch them all.
Videos in the list include a description of a scratch-built BITx, demonstrations, Bitx and uBitx mods and more.
https://www.youtube.com/playlist?list=PLj8-NKcZtRf7vA1dJ48bpEbTKyfoUv-4t