YouTube Channel Retainer
Four videos a month, twelve to eighteen minutes each, from roughly 90 minutes of raw footage per episode. Cuts, captions, basic colour, music and thumbnails.
The ratio of raw to finished footage is the real cost driver — 90 minutes down to 15 is a lot of reviewing before a single cut. Thumbnails are a separate craft bundled in here. A retainer at this cadence is worth a discount on the per-video rate; state that it depends on the cadence holding.