> simple technical skills like optimally encoding a video respecting a maximum bitrate requirement. This is in no way a "simple skill" as maximum video bitrate

> simple technical skills like optimally encoding a video respecting a maximum bitrate requirement. This is in no way a "simple skill" as maximum video bitrate is only one of a number of factors for encoding video. For streaming to end users there's questions of codecs, codec profiles, entropy coding options, GOP sizes, frame rates, and frame sizes. This also applies for your audio but replacing frame rates and sizes with sample rate and number of channels. Streaming to ten random devices will require different combinations of any or all of those settings. There's no one single optimum setting. YouTube encodes dozens of combinations of audio and video streams from a single source file. Video it turns out is pretty complicated.