If you are not sure if the website you want to visit is safe, you can check it out here. Enter the address (url) of the website and see the invisible elements, such as a header or meta data.
site address:img.youtube.com/vi/n_w-wDYO8b4/mqdefault.jp...
site title:
Url ContentJPEG Image
MIME Type / Internet Media Typeimage/jpeg
MIME Type image
File Extension.jpeg, .jpg
More Details (link to:)RFC 1314
Powered by: Very Tiny URL Shortener at https://vturl.net VeryTinyURL

Header

HTTP/1.1 200 OK
Accept-Ranges bytes
Content-Type image/jpeg
Timing-Allow-Origin htt????/imasdk.googleapis.com
Content-Length 22174
Date Tue, 17 Jul 2018 03:32:07 GMT
Expires Tue, 17 Jul 2018 05:32:07 GMT
ETag 1452810909
X-Content-Type-Options nosniff
Server sffe
X-XSS-Protection 1; mode=block
Age 2006
Cache-Control public, max-age=7200

Load Info

page size22174
load time (s)0.005446
redirect count0
speed download0
server IP216.58.206.238


* all occurrences of the string "http://" have been changed to "htt???/"