This should work on the provided examples

(youtu.*be.*)\/(watch\?v=|embed\/|v|shorts|)(.*?((?=[&#?])|$))

https://regex101.com/r/5JhmpW/1 The actual video id should be the third capture group in each match.

• Group1: Url up to the last part
• Group2: The last part of the url which receives the videoId as parameter
• Group3: Either the last part in the url (which is the videoId in the "/v/" , "/embed/", "/user/", "/shorts/" and "youtu.be/" variants ), or the videoId parameter (in the case of watch)

You can use it in javascript like this:

let data = `http://www.youtube.com/watch?v=0zM3nApSvMg&feature=feedrec_grec_index
http://www.youtube.com/user/IngridMichaelsonVEVO#p/a/u/1/QdK8U-VIH_o
http://www.youtube.com/v/0zM3nApSvMg?fs=1&hl=en_US&rel=0
http://www.youtube.com/watch?v=0zM3nApSvMg#t=0m10s
http://www.youtube.com/embed/0zM3nApSvMg?rel=0
http://www.youtube.com/watch?v=0zM3nApSvMg
http://youtu.be/0zM3nApSvMg
https://youtube.com/shorts/0dPkkQeRwTI?feature=share
https://youtube.com/shorts/0dPkkQeRwTI`;
let regex = /(youtu.*be.*)\/(watch\?v=|embed\/|v|shorts|)(.*?((?=[&#?])|$))/gm;
let videoIds = [...data.matchAll(regex)].map(x => x[3]);

Or if you only expect one url at a time:

function getVideoId(url) {
    let regex = /(youtu.*be.*)\/(watch\?v=|embed\/|v|shorts|)(.*?((?=[&#?])|$))/gm;
    return regex.exec(url)[3];
}

keep in mind regex in javascript aren't stateless, running the same regex multiple times will cause it to iterate through the matches in the text (and eventually return NULL once it has reached the end), which is why the regex is re initialized on every call in this case. If no matches are found, it will also return null.