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:pbs.twimg.com/ext_tw_video_thumb/1242736270125813761/pu/img/FHKBlcvGmf7ozC-S.jpg?name=ori...
URL does not point to a web page (html/xhtml) or read error or page not found. (404)

Header

HTTP/1.1 404 Not Found
Accept-Ranges bytes
access-control-allow-origin *
access-control-expose-headers Content-Length
Age 0
cache-control max-age=10, must-revalidate
Content-Type image/jpeg
Date Sun, 18 Apr 2021 19:45:38 GMT
Last-Modified Sun, 18 Apr 2021 19:45:38 GMT
Server ECS (pab/6FB0)
strict-transport-security max-age=631138519
timing-allow-origin htt????/twitter.com, htt????/mobile.twitter.com
X-Cache MISS
x-connection-hash b8eb234fa0d42f59afb1875aa87f78ec
X-Content-Type-Options nosniff
x-response-time 233
x-tw-cdn VZ
x-tw-cdn VZ
Content-Length 0

Load Info

load time (s)0.399294
redirect count0
speed download0
server IP93.184.220.70


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