Expired affiliate links are quietly costing you money — how to audit your YouTube descriptions

Your back catalog keeps earning views long after upload day. The links in those descriptions, though, quietly rot: affiliate programs close, sponsors change landing pages, discount codes expire, and product pages 404. Every one of those is a click you already earned and then threw away.

Here's a concrete audit you can run across your entire channel — and how to fix everything you find in one pass.

What actually breaks over time

Affiliate tags that no longer track. Amazon Associates deactivates tags after periods of inactivity or account changes. The link still works — it just credits nobody.
Retired sponsor URLs. Brands redesign sites constantly.brand.com/creator-name becomes a 404 without anyone telling you.
Expired discount codes. A code that fails at checkout costs you the sale and the trust.
Old handles and dead socials. A rebrand leaves hundreds of descriptions pointing at an account you don't run anymore.
Shortener links you don't control. If a free shortener shuts down, every link that used it dies at once.

Step 1 — Make a list of every link you've ever used

Open a spreadsheet with four columns: link/text, where it points, still valid?, replacement. Pull from your affiliate dashboards, past sponsor contracts, and your own standard description template. Most creators find 15–40 distinct link patterns across a catalog, not hundreds.

Step 2 — Test each one

Click every link in an incognito window. You're checking three things: does it load, does it land on the right page, and does your tracking parameter survive the redirect? That last one catches the sneakiest failure — a link that works perfectly but drops ?tag=yourtag along the way.

Step 3 — Find which videos contain each broken link

This is where doing it manually collapses. Instead of opening videos one by one, use the find step of a bulk editor to search your whole catalog for a string — the old affiliate tag, the dead domain, the retired code — and see every video that contains it.

In Description Modifier, paste the string into Find and you get a list of matching videos with a line-by-line preview before anything is written.

Step 4 — Replace in bulk, with a preview

Work one pattern at a time rather than trying to fix everything in a single run. For each: find the old string, enter the new one, read the diff, then confirm. Doing it in passes keeps each change reviewable and easy to undo if you spot a mistake later.

A tip that saves future audits: replace raw affiliate URLs with links you control (your own domain redirect or a paid shortener). Next time a program changes, you update one redirect instead of 400 descriptions.

Step 5 — Standardize the footer while you're in there

Since you're already touching every description, append a consistent block to the bottom of all of them: socials, newsletter, shop, and current sponsor. Consistency makes the next audit trivial, because there's exactly one pattern to search for.

How often should you re-run this?

Quarterly for affiliate tags and discount codes.
Whenever a sponsorship ends — remove or repoint the URL the week it lapses.
Immediately after any rebrand — handles, domain, channel name.

What this is worth

Run the math on your own numbers: if your back catalog does 50,000 views a month, a 1% description click-through is 500 clicks. If even a third of those are hitting a dead or untracked link, that's ~170 clicks a month going nowhere — every month, compounding, for as long as the videos keep getting watched. An afternoon of auditing pays for itself repeatedly.

Want to audit yours? Install Description Modifier for Chrome — 5 free edits, no card required. Pro is $9/mo for unlimited edits, and Agency plans start at $39/mo for 5 channels.