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/sAXad7hvaHU/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 18827
Date Mon, 23 Jul 2018 17:23:48 GMT
Expires Mon, 23 Jul 2018 19:23:48 GMT
ETag 1454016913
X-Content-Type-Options nosniff
Server sffe
X-XSS-Protection 1; mode=block
Age 1041
Cache-Control public, max-age=7200

Load Info

page size18827
load time (s)0.004978
redirect count0
speed download0
server IP216.58.201.238


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