A Javascript Bookmarklet That creates a menu for downloading YT Vids without needing any third party app nor site.
How It works
- The code is ought to extract links from the youtube video source code The download look like this
https://rr2---sn-p5qlsnrr.googlevideo.com/videoplayback?expire=1684468489\u0026ei=qZ5mZN7BNMKK8wS1_oPwAQ\u0026ip=5.161.183.140\u0026id=o-AJuy0sBEqnpSzwaxTvnIu073VR0LXVtqdliiv_1OFgf9\u0026itag=133\u0026aitags=133%2C134%2C135%2C136%2C137%2C160%2C242%2C243%2C244%2C247%2C248%2C278\u0026source=youtube\u0026requiressl=yes\u0026mh=rN\u0026mm=31%2C29\u0026mn=sn-p5qlsnrr%2Csn-p5qs7nsk\u0026ms=au%2Crdu\u0026mv=m\u0026mvi=2\u0026pl=25\u0026initcwndbps=228750\u0026vprv=1\u0026svpuc=1\u0026mime=video%2Fmp4\u0026ns=K3Z9gDwnP7LVoVPaftnIDXYN\u0026gir=yes\u0026clen=15402279\u0026dur=858.840\u0026lmt=1684426280879666\u0026mt=1684446550\u0026fvip=2\u0026keepalive=yes\u0026fexp=24007246\u0026c=WEB\u0026txp=6319224\u0026n=71Y3gTJ9yPp1DNi2Kb\u0026sparams=expire%2Cei%2Cip%2Cid%2Caitags%2Csource%2Crequiressl%2Cvprv%2Csvpuc%2Cmime%2Cns%2Cgir%2Cclen%2Cdur%2Clmt\u0026sig=AOq0QJ8wRAIgaf5d6vVdJEd4bfxpyTZIpX94BNLZJj2NxqsCF8o5xwACIH5_shJUMe1LiCm4gbX4w9cxDP1doWUCTDkvz-HCtJ-k\u0026lsparams=mh%2Cmm%2Cmn%2Cms%2Cmv%2Cmvi%2Cpl%2Cinitcwndbps\u0026lsig=AG3C_xAwRQIgFgL1GSHAIL3dDefp4zeDWQ5Y2YYpXQx7oILBvaqvxa0CIQDSrlTcbeUqwKT859PtJ-Wa1DXspKM1auWPvRCd_xFdSA%3D%3D
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The highlight to distinguish these links from the others is "videoplayback?expire" so there shall be a regex to extract all urls that contain that.
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to specify the video quality/format we use the itag parameter from the link. we know that the itag parameter with value "22" stands for 720 mp4 ...etc the full list
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for the urls to work you need to replace "\u0026" with "&" and decode / Escape any encoded bits
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The bookmarklet Prompt Version should show a prompt that allows the user to select from the available formats while the WithMenu injects a menu into the current video code
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Copy the code from WithMenuMimfiyed.js or PromptMimfiyed.js whatever you prefer from the two , then add a new page to the bookmark bar , and paste the code into the url of the bookmark , and input any name.
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now you go to whatever YT vid page you want to download and click on the newly created bookmark page. then the download menu will pop up. note that you need to refersh the page each time you use it.
Menu.compressed.mp4
PromptEdited.mp4
Side Note : to make the downloaded files have the vid name we added a title parameter to the url with the vid name extracted using the tab title
