Preparation of the wordpress plugin

Preparing a plugin for wordpress with the possibility of:

1. Upload your contacts

2. Record video from computer camera / mobile web level

3. Additionally, automatic joining of the previously uploaded video with the recorded from point 2

4. Possibility to connect your own gmail / or other mailbox

5. Sending e-mails in a delayed scenario

6. The mechanism of charging for the use of the plug-in

7. Generating GIF preview from 2 + 3 video

8. Integration with Zapier (the ability to add contacts from outside)

I am asking only people who previously prepared a plug for wordpress.