是否可以使用API v3 的视频ID获取视频标题而不使用 API密钥？我在API文档中找不到任何获取标题的信息或示例。
答案 0 :(得分：21)
要获得视频标题，您不需要API密钥，并且您需要提出以下请求：
https://noembed.com/embed?url=https://www.youtube.com/watch?v=dQw4w9WgXcQ
更改所需视频的YouTube网址。
它也适用于Vimeo和许多其他supported sites，其网址如下：
https://noembed.com/embed?url=https://vimeo.com/45196609
如果直接使用API，则无法在没有API密钥的情况下使用带有API v3的视频ID获取视频标题。 YouTube数据API v2已弃用（请参阅：YouTube Data API v2 Deprecation: Frequently Asked Questions），目前YouTube API不支持oEmbed JSONP（请参阅Issue 4329: oEmbed callback for JSONP）。
但幸运的是，Noembed服务可让您通过JSONP获取YouTube视频的标题（和其他数据），而无需API密钥。
这是一个用jQuery获取标题的简单演示：
var id = 'dQw4w9WgXcQ';
var url = 'https://www.youtube.com/watch?v=' + id;
$.getJSON('https://noembed.com/embed',
{format: 'json', url: url}, function (data) {
alert(data.title);
});
请参阅JS Bin上的DEMO。
另见这些问题：
答案 1 :(得分：17)
要获取视频标题，将需要API密钥，您需要提出以下请求：
https://www.googleapis.com/youtube/v3/videos?part=snippet&id={COMMA_DELIMITED_LIST_OF_IDS}&key={YOUR_API_KEY}
在返回的数据包中，标题将位于items.snippet.title
如果没有API密钥，您无法检索任何 API数据;所有API请求都在配额系统上，并且该密钥用于确定向应用的每日限额收取多少费用。然而，如上所述的呼叫相当便宜;它总共有3个单元（代码片段为2个，请求本身为1个）。由于您每天可以获得50,000,000个单位，并且可以为相同的3个单元检索多达50个片段，因此使用API密钥并不是一个很大的负担。
答案 2 :(得分：3)
它似乎正是 oEmbed 协议的含义。
oEmbed是一种允许在其上嵌入表示URL的格式 第三方网站。简单的API允许网站显示嵌入式 用户发布指向该内容的内容（如照片或视频） 资源，无需直接解析资源。
此文档存储在GitHub。
有关格式的更多信息：https://oembed.com
https://www.youtube.com/oembed?url=http%3A//youtube.com/watch%3Fv%3DM3r2XDceM6A&format=json
示例输出：
{
"version": "1.0",
"type": "video",
"provider_name": "YouTube",
"provider_url": "http://youtube.com/",
"width": 425,
"height": 344,
"title": "Amazing Nintendo Facts",
"author_name": "ZackScott",
"author_url": "http://www.youtube.com/user/ZackScott",
"html":
"<object width=\"425\" height=\"344\">
<param name=\"movie\" value=\"http://www.youtube.com/v/M3r2XDceM6A&fs=1\"></param>
<param name=\"allowFullScreen\" value=\"true\"></param>
<param name=\"allowscriptaccess\" value=\"always\"></param>
<embed src=\"http://www.youtube.com/v/M3r2XDceM6A&fs=1\"
type=\"application/x-shockwave-flash\" width=\"425\" height=\"344\"
allowscriptaccess=\"always\" allowfullscreen=\"true\"></embed>
</object>",
}
以下是声明符合格式的内容提供商列表：
"provider_name": "23HQ",
"provider_name": "Adways",
"provider_name": "Alpha App Net",
"provider_name": "amCharts Live Editor",
"provider_name": "Animatron",
"provider_name": "Animoto",
"provider_name": "Audiomack",
"provider_name": "AudioSnaps",
"provider_name": "Blackfire.io",
"provider_name": "Box Office Buz",
"provider_name": "Buttondown",
"provider_name": "Cacoo",
"provider_name": "Carbon Health",
"provider_name": "CatBoat",
"provider_name": "ChartBlocks",
"provider_name": "chirbit.com",
"provider_name": "CircuitLab",
"provider_name": "Clipland",
"provider_name": "Clyp",
"provider_name": "Codepen",
"provider_name": "Codepoints",
"provider_name": "CodeSandbox",
"provider_name": "CollegeHumor",
"provider_name": "Commaful",
"provider_name": "Coub",
"provider_name": "Crowd Ranking",
"provider_name": "Cyrano Systems",
"provider_name": "Daily Mile",
"provider_name": "Dailymotion",
"provider_name": "Deviantart.com",
"provider_name": "Didacte",
"provider_name": "Dipity",
"provider_name": "DocDroid",
"provider_name": "Docs",
"provider_name": "Dotsub",
"provider_name": "edocr",
"provider_name": "eduMedia",
"provider_name": "EgliseInfo",
"provider_name": "Embed Articles",
"provider_name": "Embedly",
"provider_name": "Ethfiddle",
"provider_name": "Eyrie",
"provider_name": "Facebook (Video)",
"provider_name": "Flat",
"provider_name": "Flickr",
"provider_name": "FOX SPORTS Australia",
"provider_name": "FrameBuzz",
"provider_name": "FunnyOrDie",
"provider_name": "Geograph Britain and Ireland",
"provider_name": "Geograph Channel Islands",
"provider_name": "Geograph Germany",
"provider_name": "Getty Images",
"provider_name": "Gfycat",
"provider_name": "GIPHY",
"provider_name": "Gyazo",
"provider_name": "HuffDuffer",
"provider_name": "Hulu",
"provider_name": "iFixit",
"provider_name": "IFTTT",
"provider_name": "Indaco",
"provider_name": "Infogram",
"provider_name": "Inoreader",
"provider_name": "inphood",
"provider_name": "Instagram",
"provider_name": "iSnare Articles",
"provider_name": "ivlismusic",
"provider_name": "Kickstarter",
"provider_name": "Kidoju",
"provider_name": "Kit",
"provider_name": "Kitchenbowl",
"provider_name": "Knacki",
"provider_name": "LearningApps.org",
"provider_name": "Ludus",
"provider_name": "MathEmbed",
"provider_name": "me.me",
"provider_name": "Meetup",
"provider_name": "MixCloud",
"provider_name": "Moby Picture",
"provider_name": "Modelo",
"provider_name": "myBeweeg",
"provider_name": "nanoo.tv",
"provider_name": "nfb.ca",
"provider_name": "Odds.com.au",
"provider_name": "Office Mix",
"provider_name": "Official FM",
"provider_name": "On Aol",
"provider_name": "Ora TV",
"provider_name": "Orbitvu",
"provider_name": "Oumy",
"provider_name": "Pastery",
"provider_name": "Pixdor",
"provider_name": "Poll Daddy",
"provider_name": "Port",
"provider_name": "Portfolium",
"provider_name": "Punters",
"provider_name": "Quiz.biz",
"provider_name": "Quizz.biz",
"provider_name": "RapidEngage",
"provider_name": "Reddit",
"provider_name": "ReleaseWire",
"provider_name": "RepubHub",
"provider_name": "ReverbNation",
"provider_name": "Roomshare",
"provider_name": "Rumble",
"provider_name": "Sapo Videos",
"provider_name": "Screen9",
"provider_name": "Screencast.com",
"provider_name": "Screenr",
"provider_name": "ScribbleMaps",
"provider_name": "Scribd",
"provider_name": "ShortNote",
"provider_name": "Shoudio",
"provider_name": "Show the Way, actionable location info",
"provider_name": "Silk",
"provider_name": "Simplecast",
"provider_name": "Sizzle",
"provider_name": "Sketchfab",
"provider_name": "SlideShare",
"provider_name": "SmugMug",
"provider_name": "SocialExplorer",
"provider_name": "Songlink",
"provider_name": "SoundCloud",
"provider_name": "Soundsgood",
"provider_name": "SpeakerDeck",
"provider_name": "Spotful",
"provider_name": "Spreaker",
"provider_name": "Streamable",
"provider_name": "StreamOneCloud",
"provider_name": "Sutori",
"provider_name": "Sway",
"provider_name": "Ted",
"provider_name": "The New York Times",
"provider_name": "They Said So",
"provider_name": "TickCounter",
"provider_name": "Toornament",
"provider_name": "Topy",
"provider_name": "Twitch",
"provider_name": "Twitter",
"provider_name": "Ubideo",
"provider_name": "UOL",
"provider_name": "Ustream",
"provider_name": "Utposts",
"provider_name": "Uttles",
"provider_name": "VeeR VR",
"provider_name": "Verse",
"provider_name": "VEVO",
"provider_name": "VideoJug",
"provider_name": "Vidlit",
"provider_name": "Vimeo",
"provider_name": "Vlipsy",
"provider_name": "wecandeo",
"provider_name": "Wiredrive",
"provider_name": "wizer.me",
"provider_name": "Wootled",
"provider_name": "WordPress.com",
"provider_name": "Yes, I Know IT!",
"provider_name": "YFrog",
"provider_name": "YouTube",
"provider_name": "ZProvider",
请注意，这并不意味着在此网站上启用了 CORS 。
这些数据主要用于解析服务器端。
大部分信息也可以通过解析给定页面的<meta og> 开放图 html属性来获得。
有关打开图表的信息，请参阅http://ogp.me/。
答案 3 :(得分：0)
是的，您无需任何API就可以请求和 re 模块
import requests,re
video_url = "https://www.youtube.com/watch?v=2i2khp_npdE"
response = requests.get(video_url).text
title = re.findall(r'"title":"[^>]*",',response)[0].split(',')[0][9:-1]
print("\n[+] Video Title: {}".format(title))
[+]视频标题：艾伦·沃克（Alan Walker）-唱歌让我睡觉