Youtube Video Id from URL - Swift3

Question

Basically I have a Youtube URL as string, I want to extract the video Id from that URL. I found some code in objective c that is as below:

NSError *error = NULL;         


        

Answer 1

Safer version (without force unwrapping !):

extension String {
    var youtubeID: String? {
        let pattern = "((?<=(v|V)/)|(?<=be/)|(?<=(\\?|\\&)v=)|(?<=embed/))([\\w-]++)"

        let regex = try? NSRegularExpression(pattern: pattern, options: .caseInsensitive)
        let range = NSRange(location: 0, length: count)

        guard let result = regex?.firstMatch(in: self, range: range) else {
            return nil
        }

        return (self as NSString).substring(with: result.range)
    }
}

Examples:

"https://www.youtube.com/watch?v=C0DPdy98e4c".youtubeID // "C0DPdy98e4c"
"https://youtube.com/watch?v=C0DPdy98e4c".youtubeID // "C0DPdy98e4c"
"www.youtube.com/watch?v=C0DPdy98e4c".youtubeID // "C0DPdy98e4c"
"youtube.com/watch?v=C0DPdy98e4c".youtubeID // "C0DPdy98e4c"

"https://youtu.be/C0DPdy98e4c".youtubeID // "C0DPdy98e4c"
"youtu.be/C0DPdy98e4c".youtubeID // "C0DPdy98e4c"

Credits: Usman Nisar's answer

Answer 2

Your first problem is you are not escaping ? in your expression. ? is reserved character and if you want to use it in your expressions, you must escape with \ and since \ is used also to escape " character you must escape ? with double backslash something like \\?. So according to above information, following code correctly extracts the videoId

let youtubeURL = "https://www.youtube.com/watch?v=uH8o-JTHJdM"
let regex = try! NSRegularExpression(pattern: "\\?.*v=([^&]+)", options: .caseInsensitive)
let match = regex.firstMatch(in: youtubeURL, options: [], range: NSRange(location: 0, length: youtubeURL.characters.count))
if let videoIDRange = match?.rangeAt(1) {
    let substringForFirstMatch = (youtubeURL as NSString).substring(with: videoIDRange)
} else {
    //NO video URL
}

Answer 3

Swift 5

var youtubeURLs = [
    "http://www.youtube.com/watch?v=-wtIMTCHWuI",
    "http://www.youtube.com/v/-wtIMTCHWuI?version=3&autohide=1",
    "http://youtu.be/-wtIMTCHWuI",
    "http://www.youtube.com/oembed?url=http%3A//www.youtube.com/watch?v%3D-wtIMTCHWuI&format=json",
    "https://youtu.be/uJ2PZaO1N5E",
    "https://www.youtube.com/embed/M7lc1UVf-VE",
    "http://www.youtube.com/attribution_link?a=JdfC0C9V6ZI&u=%2Fwatch%3Fv%3DEhxJLojIE_o%26feature%3Dshare",
    "https://www.youtube.com/attribution_link?a=8g8kPrPIi-ecwIsS&u=/watch%3Fv%3DyZv2daTWRZU%26feature%3Dem-uploademail"
]

func getVideoID(from urlString: String) -> String? {
    guard let url = urlString.removingPercentEncoding else { return nil }
    do {
        let regex = try NSRegularExpression.init(pattern: "((?<=(v|V)/)|(?<=be/)|(?<=(\\?|\\&)v=)|(?<=embed/))([\\w-]++)", options: .caseInsensitive)
        let range = NSRange(location: 0, length: url.count)
        if let matchRange = regex.firstMatch(in: url, options: .reportCompletion, range: range)?.range {
            let matchLength = (matchRange.lowerBound + matchRange.length) - 1
            if range.contains(matchRange.lowerBound) &&
                range.contains(matchLength) {
                let start = url.index(url.startIndex, offsetBy: matchRange.lowerBound)
                let end = url.index(url.startIndex, offsetBy: matchLength)
                return String(url[start...end])
            }
        }
    } catch {
        print(error.localizedDescription)
    }
    return nil
}

for url in youtubeURLs {
    print("Video id: \(getVideoID(from: url) ?? "NA") for url: \(url)")
}

Result:

Video id: -wtIMTCHWuI for url: http://www.youtube.com/watch?v=-wtIMTCHWuI
Video id: -wtIMTCHWuI for url: http://www.youtube.com/v/-wtIMTCHWuI?version=3&autohide=1
Video id: -wtIMTCHWuI for url: http://youtu.be/-wtIMTCHWuI
Video id: -wtIMTCHWuI for url: http://www.youtube.com/oembed?url=http%3A//www.youtube.com/watch?v%3D-wtIMTCHWuI&format=json
Video id: uJ2PZaO1N5E for url: https://youtu.be/uJ2PZaO1N5E
Video id: M7lc1UVf-VE for url: https://www.youtube.com/embed/M7lc1UVf-VE
Video id: EhxJLojIE_o for url: http://www.youtube.com/attribution_link?a=JdfC0C9V6ZI&u=%2Fwatch%3Fv%3DEhxJLojIE_o%26feature%3Dshare
Video id: yZv2daTWRZU for url: https://www.youtube.com/attribution_link?a=8g8kPrPIi-ecwIsS&u=/watch%3Fv%3DyZv2daTWRZU%26feature%3Dem-uploademail

Answer 4

I have a different way of doing this using URLComponents. You then just select the 'v' parameter from the url, if it exists.

func getYoutubeId(youtubeUrl: String) -> String? {
    return URLComponents(string: youtubeUrl)?.queryItems?.first(where: { $0.name == "v" })?.value
}

And then pass in a Youtube url like this:

print (getYoutubeId(youtubeUrl: "https://www.youtube.com/watch?v=Y7ojcTR78qE&spfreload=9"))

Answer 5

To get video Id from Youtube Url, use code # Swift4 :

var videoId = ""

    if youtubeLink.lowercased().contains("youtu.be"){
            linkString = youtubeLink
            if let range = linkString.range(of: "be/"){
                videoId = youtubeLink[range.upperBound...].trimmingCharacters(in: .whitespaces)
            }
        }
        else if youtubeLink.lowercased().contains("youtube.com"){
            linkString = youtubeLink
            if let range = linkString.range(of: "?v="){
                videoId = youtubeLink[range.upperBound...].trimmingCharacters(in: .whitespaces)
            }
        }

Hope will be helping! :)

Answer 6

A Swift 4 version using the elegant flatMap:

func extractYouTubeId(from url: String) -> String? {
    let typePattern = "(?:(?:\\.be\\/|embed\\/|v\\/|\\?v=|\\&v=|\\/videos\\/)|(?:[\\w+]+#\\w\\/\\w(?:\\/[\\w]+)?\\/\\w\\/))([\\w-_]+)"
    let regex = try? NSRegularExpression(pattern: typePattern, options: .caseInsensitive)
    return regex
        .flatMap { $0.firstMatch(in: url, range: NSMakeRange(0, url.count)) }
        .flatMap { Range($0.range(at: 1), in: url) }
        .map { String(url[$0]) }
}

This method uses a regex that detects most of the possible YouTube URL formats (.be/*, /embed/, /v/ - you can find the full list here).