senden
to broadcast
To broadcast a program or show on radio, television, or the internet.
Der Sender wird die Dokumentation heute Abend um 20:15 Uhr senden.
The station will broadcast the documentary tonight at 8:15 p.m.

to send / broadcast
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to broadcast
To broadcast a program or show on radio, television, or the internet.
Der Sender wird die Dokumentation heute Abend um 20:15 Uhr senden.
The station will broadcast the documentary tonight at 8:15 p.m.

The verb 'senden' (to send/broadcast) has two past-tense forms: a regular one ('sendete', 'hat gesendet') and an irregular one ('sandte', 'hat gesandt'). Which form you use depends on the meaning.
Der Radiosender hat gestern ein interessantes Interview gesendet.
The radio station broadcast an interesting interview yesterday.
The regular form 'gesendet' is almost always used for broadcasting on television or radio. The irregular form 'gesandt' is used when you send something by mail or, in formal language, send a person.
Die Live-Übertragung wurde weltweit gesendet.
The live broadcast was broadcast worldwide.
When you indicate to whom you are sending something, that person or recipient is in the dative. The thing being sent is in the accusative.
Bitte senden Sie mir die Rechnung per Post.
Please send me the invoice by mail.
In the context of media, 'senden' (to broadcast) is often combined with words like 'live', 'eine Sendung' (a show/broadcast), 'ein Programm' (a program), or 'ein Signal' (a signal).
Viele Fernsehsender senden rund um die Uhr ein Programm.
Many television stations broadcast programming around the clock.
to send
'schicken' and 'senden' can both mean that something goes to a recipient, for example a letter, a package, or a message. In many everyday situations, they are interchangeable. 'schicken' often sounds a bit more everyday and personal. 'senden' sounds somewhat more formal and works well for emails, documents, or official messages. Learners can easily confuse the words because here they mean almost the same thing. The only important point is: 'senden' also has other meanings, for example in radio or television; 'schicken' does not fit there.

Die Ärztin hat den Bericht direkt an die Klinik gesendet.
The doctor sent the report directly to the clinic.
Mein Bruder schickt mir am Montag das Geld.
My brother is sending me the money on Monday.