If you are trying to find the files online, use these search terms:
Sometimes, telling YouTube you are using an ancient version of Internet Explorer will force the site to serve a "Legacy" mobile or desktop site. Method 2: The Wayback Machine youtube old version open
Since YouTube constantly updates its interface (player, layout, comments, shorts), an “old version” typically refers to the (pre-Shorts, pre-massive UI flattening, pre-dislike count removal) or just 2–3 major versions behind the current release. If you are trying to find the files
Older clients don’t preload comments, don’t keep the feed refreshing in background, and use older, less resource-intensive codecs (H.264 over VP9). Running an old version of YouTube offers faster
Running an old version of YouTube offers faster performance and a clutter-free layout, but it lacks modern safety, feature, and compatibility updates. It is best for secondary devices, low-end hardware, or temporary escape from ads/shorts —not as a primary daily driver.
To "open" or revert these versions, the community has developed several high-profile projects:
Patch modern YouTube to . You get old performance with modern API compatibility.