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/PWOumWMQxjo/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 21567
Date Mon, 23 Apr 2018 23:12:22 GMT
Expires Tue, 24 Apr 2018 01:12:22 GMT
ETag 1507133542
X-Content-Type-Options nosniff
Server sffe
X-XSS-Protection 1; mode=block
Age 5704
Cache-Control public, max-age=7200

Load Info

page size21567
load time (s)0.004849
redirect count0
speed download0
server IP216.58.204.142


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