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Will YouTube Ever Run Out Of Video IDs?

Will YouTube Ever Run Out Of Video IDs? on HackerTube: recommended by 1 Hacker News commenter across 1 month, 2021–2026.

Tom Scott

explainer · evergreen

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Tom Scott explains YouTube's 11-character video IDs, which are base-64 encoded 64-bit numbers, and whether YouTube could ever run out of them. It covers counting systems and base 64 briefly.

Why Hacker News recommends it

HN links it whenever IDs, base64 or random identifier space come up, as a short and pleasant explainer.

people recommended it
1
separate months
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strong recommendations
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discussed on HN
2021–2026
“There's a Tom Scott video [2] that describes Youtube video IDs as 11-digit base-64 random numbers”
— ekipan, Feb 2026, in “Cosmologically Unique IDs”

What HN commenters said

7 Hacker News comments link this video. Each one links back to its thread.

apocalyptic0n3Feb 2021Recommends

Him dancing around and celebrating at the end of his 5 minute explanation of YouTube IDs [1] is such an uplifting thing to watch. 1: ▶ this video

in “YouTubers have to declare ads. Why doesn't anyone else? [video]” · View on HN

ekipanFeb 2026Cites it

I forget the context but the other day I also learned about Snowflake IDs [1] that are apparently used by Twitter, Discord, Instagram, and Mastodon. Timestamp + random seems like it could be a good tradeoff to reduce the ID sizes and still get reasonable characteristics, I'm surprised the article didn't explore there (but then again "timestamps" are a lot more nebulous at universal scale I suppose). Just spitballing here but I wonder if it would be worthwhile to reclaim ten bits of the Snowflake timestamp and use the low 32 bits for a random number. Four billion IDs for each second. There's a Tom Scott video [2] that describes Youtube video IDs as 11-digit base-64 random numbers, but I don't see any official documentation about that. At the end he says how many IDs are available but I don't think he considers collisions via the birthday paradox. [1]: [link] [2]: ▶ this video

in “Cosmologically Unique IDs” · View on HN

dajonkerOct 2023Cites it

Similar to the old situation in the article, we are using sequential 64 bit primary keys, but we use an additional random 64 bit key for external usage (instead of 128 bit). The external key is base64 encoded for use in URLs which results in an 11 byte string. This hides any information about the size of the data, the creation date of customer accounts (which would be sort of visible with UUIDv7) and prevents anyone from attempting to enumerate data by changing the integer in URLs. I thought about using UUIDs as external keys but the only compelling use case seems to be the ability to generate keys from many decoupled sources that have to be merged later. 64 bit should be enough for most things ▶ this video

in “Bye Sequence, Hello UUIDv7” · View on HN

kaliszadAug 2021Cites it

Well, have fun guessing 2^64 possibilities. YouTube lists even private videos "secured" using 11 BASE64 characters (66 bits in theory, but they seem to use just 64 bits). You can watch Tom Scott explain it: ▶ this video CG-NAT doesn't really prevent geolocation. Better services will still pin-point you to the nearest city. There are perhaps easier ways to get your private info or your money - phishing and ransomware seem to be still very popular. Don't have to hack games that only relatively few people have. It is more profitable to attack a bigger market or more wealthy institutions or companies in foreign countries. Also, if you hack the central game server, you will have a lot more victims... Choose your poison. I guess, there are no games or other software that cannot be audited in high security installations. At home, having a work computer and a game computer (or a VM with GPU pass through or whatever) might be a safer choice in any case independent of IPv4 or IPv6 usage or the quality of your firewall.

in “India is leading IPv6 migration with 61.67% adoption” · View on HN

tabletthrowawayJun 2021Cites it

Obligatory: ▶ this video There’s too many IDs to iterate through. Searching for $defatltvideoname for some camera is far more effective for that. Scarily so.

in ““Older unlisted videos will be made private unless you opt out”” · View on HN

Vicinity9635Jul 2024Joke

>Author and programmer Sam Hughes, by the way, pushed this to the limit and invented Base 65,536, which includes basically every character from every language. It is ridiculous and unnecessary, but when has that ever stopped programmers? ▶ this video

in “PySkyWiFi: Free stupid wi-fi on long-haul flights” · View on HN

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ChickenNuggerFeb 2023Joke

Two thoughts: * This is ridiculous. Why would you do this? Which made think of this quote: "Which is ridiculous and unnecessary but when has that ever stopped programmers?" from one of my favorite Tom Scott videos: ▶ this video * How to Write Unmaintainable Code: [link]

in “Show HN: Spaghettify – A VSCode Extension to make your code worse with AI” · View on HN

Topics & tags

Software (other)Internet culture & memesbase64youtubevideo idsid spacetom scott