The default video player only offers a few fixed speeds — 0.5×, 0.75×, 1×, 1.25×, 1.5×, and 2× — which might not be the pace you want. This bookmarklet lets you fine-tune the playback rate to any value, like 1.75×.
1Make sure your bookmarks bar is visible — press Ctrl+Shift+B (or ⌘+Shift+B on Mac)
2Drag the orange button above to your bookmarks bar
3Navigate to an Anthropic Course — you must be on the course page before activating, e.g. Claude Code in Action
4Click the bookmark — enter your desired speed, hit OK, and the page will auto-refresh with your new rate
› View source code
javascript:void(function(){var t=document.createElement('div');t.style.cssText='position:fixed;top:20px;right:20px;color:%23fff;padding:10px 20px;border-radius:8px;font:14px/1 sans-serif;z-index:999999;opacity:1;transition:opacity .5s';function show(m,c){t.textContent=m;t.style.background=c;document.body.appendChild(t);setTimeout(function(){t.style.opacity='0';setTimeout(function(){t.remove()},500)},2000)}if(location.hostname!=='anthropic.skilljar.com'){show('✗ This only works on anthropic.skilljar.com','%23c0392b');return}var s=prompt('Playback speed:','1.75');if(s){sessionStorage.setItem('video-playback-rate',s);show('✓ Speed set to '+s+'x — Refreshing...','%23D97857');setTimeout(function(){location.reload()},1750)}}())
Works on Anthropic Courses at anthropic.skilljar.com