How to create a bot in telegrams (more precisely, how to set it up)?

Question

Bots

Please tell me how to create a bot in telegram. The essence of the bot is shorter, the client throws a link to the video, this link should go to the Savefrom website, then there appears a link to download this video only in the form of a button, so this link (which is in the button) the bot must send to the client or the bot must download this video and throw it off please help the client, I have been breaking my head for a week now, how to do this I will be very grateful.