Like subscribe overlay

Skill jperrello/C0BALT_CUT/.claude/skills/like-subscribe-overlay

Investigation on using Claude Code to automatically generate profitable YouTube videos.

Install

npx -y skills add jperrello/C0BALT_CUT --skill like-subscribe-overlay

Assembled from the repository path, not quoted from the project. Check it against their README if it does not work.

2 things to look at

no licenseNo license file was found in the repository. Code published without one is not open source by default, so using it at work is a question for whoever answers licensing questions where you are.
2 stars2 stars. Stars are a popularity signal and not a quality one, but at this level it is likely that nobody has read this closely except its author, and you would be relying on your own review.

What its author says it does

Copied from the file, not written here

Overlay the branded like/subscribe CTA animation — channel gem avatar + @C0BALT_CUT handle + subscribe/like/bell click choreography — for ~4 seconds WITHIN THE FIRST THIRD of a finished short (start clamped to end by the 1/3 mark, floored after the ~2.5s title card; early placement so viewers who bail never miss it). The animation source is cta.html (HTML+CSS+JS driving the pill pop-in, cursor moves, click punches, bell ring, thumb fill); build-cta.sh renders it frame-by-frame via headless Chromium (Playwright, omitBackground) and ffmpeg-encodes to assets/cta.mov (ProRes 4444 with alpha).

SKILL.md

3.9 KB, as published. Nobody here has run it

like-subscribe-overlay

Drops a hook-grabbing branded call to action into the short. A JS-driven animation plays in the lower third for dur seconds starting at pos fraction of the clip (default 0.15), with the start clamped so the whole CTA lands inside the first third of the clip — where retention is highest — while staying clear of the ~2.5s title card: a Carbon Black pill pops in carrying the channel gem avatar (sapphire-ringed, glow breathing) and the @C0BALT_CUT handle (Impact, Platinum, sapphire slashed zero) → cursor enters → clicks SUBSCRIBE (red → dark, scale punch, expanding ring) → bell rings → cursor glides left to the thumbs-up → clicks LIKE (thumb fills Sapphire Glow, scale punch, expanding ring) → holds the final state.

The animation is authored in plain HTML+CSS+JS (cta.html) and pre-rendered once into a transparent ProRes 4444 .mov asset (assets/cta.mov). Runtime just composites that asset. The avatar image is assets/channel.png (square crop of the channel gem); replace it and re-run build-cta.sh to rebrand.

Invoke

.claude/skills/like-subscribe-overlay/like-subscribe-overlay.sh <input> <out> [dur=4.0] [pos=0.15]

input: finished short (any aspect ratio; designed for 1080x1920)
out: output mp4
dur: total CTA duration in seconds (clamped to clip length, default 4.0)
pos: fraction of the clip at which the CTA starts (default 0.15; clamped so the CTA ends inside the first third, starts after the ~2.5s title card, and never spills past the end of the clip — in that priority order)

Output

mp4, same dimensions and duration as the input, video re-encoded (libx264 veryfast crf18), audio re-encoded to AAC 192k. Prints the output path to stdout. Idempotent: a <out>.lsmeta sidecar records the signature (dur|pos|asset-version); a cache hit requires out newer than input and a matching signature.

Brand

Colors from brand/BRAND.md: pill in Carbon Black #101418 with a Sapphire Glow #2E6BFF edge, handle in Platinum #E8ECF1 Impact with the slashed zero in Sapphire Glow (same visual language as the watermark renderer), liked thumb fills Sapphire Glow. The SUBSCRIBE button stays YouTube red pre-click for instant recognition.

Where in the pipeline

Runs after loudnorm and before bg-music / save-local. The overlay lands inside the first third of the clip (after the title card), so it composites over whatever is on screen early in the story (captions burn beneath it for those 4 seconds — intended).

How

build-cta.sh (one-time, or whenever cta.html / assets/channel.png changes): build-cta.js steps cta.html's deterministic window.setT(t) frame-by-frame in headless Chromium (Playwright, omitBackground) and ffmpeg-encodes the transparent PNGs to assets/cta.mov (ProRes 4444).
like-subscribe-overlay.sh time-stretches the asset to dur (setpts), pins it to the lower third, and enables it for [start, start+dur] where start = min(pos * clip_duration, clip_duration/3 - dur) floored at 3.0s (title-card clearance). The CTA overlays SILENTLY — the clip's source audio passes straight through (-map 0:a, no mix). The old bell-ding SFX (make_sfx.py) is retired; make_sfx.py is unused.

Gives 0 of the 12 instructions most css styling skills give

Counted across 586 of the 596 authors here whose files we hold, read 2026-08-06

avoid excessive centered layoutsin 55 of 586, across 12 files
bundle code into single HTML filein 54 of 586, across 14 files
Respect prefers-reduced-motion user settingsin 52 of 586, across 35 files
avoid purple gradientsin 51 of 586, across 11 files
avoid uniform rounded cornersin 51 of 586, across 11 files
avoid Inter fontin 51 of 586, across 11 files
edit generated files to develop artifactin 50 of 586, across 10 files
animate only transform and opacity propertiesin 43 of 586
Make touch targets at least 44x44 pixelsin 41 of 586, across 15 files
Ensure minimum color contrast of 4.5:1in 39 of 586, across 10 files
use tailwind cssin 39 of 586, across 24 files
Use SVG icons instead of emojisin 38 of 586, across 11 files

Said here and by no other author read

run build-cta.sh to pre-render the animation
time-stretch the asset to the requested duration
pin the overlay to the lower third
clamp overlay start to the first third of the clip
floor overlay start at three seconds
run after loudnorm and before bg-music

Grouped from the skills themselves: near-identical wordings counted once, and counted by distinct author, so one author publishing three of these counts once.