WhatsApp used to block links to competitors such as Telegram. It would mysteriously fail to send. I just tested it again and apparently, they now allow it.
No text is censored on WhatsApp, it's technically impossible due to E2EE. Obviously you can't send GB of data in one message, and there must some other small client-side restrictions, but nothing you can reasonably call censorship.
You can create download link by sendgb.com and share up to 5 GB via WhatsApp.
Or any other file sharing website for that matter, but at least use something more secure from a more trustworthy company, such as https://send.firefox.com/ (never heard of sendgb.com).
Yes firefox is good option. Sendgb is from Estonia. Sendgb allows file transfer up to 5 GB. File are storages up to 90 days for free. Nobody knows which one is more safety.
Sometimes big services have more security problems...like Dropbox, wetransfer etc...
Firefox Send is E2EE (albeit via JS code served at every connection), contrary to sendgb (AFAICT), which makes it a strictly better option.
Of course it's technically possible. They would just need to do the blocking on the client, before sending the message (or after receiving it).
There is/was a blacklist of words / domains in the client, the filtering done locally.