Add video recording logic

[patjfin]

Hey @jordancde - had a chat with Alex and this is where we got to for changes in the web SDK to allow for video recordings. Should be pretty minor.

Including this PR as an example of the following changes.

Main open question is whether or not you guys use the cloud or raw recording setting in DailyCo

Changes required in vapi/web

1. Add conditional option for recording user video

• This could be in the [constructor](

  web/vapi.ts

  Line 108 in e1bb6e7

  constructor(apiToken: string, apiBaseUrl?: string) {

  ) or the [OverrideAssistantDTO](

  web/api.ts

  Line 1860 in e1bb6e7

  export interface OverrideAssistantDTO {

  ) object

2. This would then be passed to the Vapi backend in the [body](

   web/api.ts

   Line 3663 in e1bb6e7

   body: data,

   ) of the request to /call/web

3. Pass this flag to the DailyCall to join with the video source enabled

this.call = DailyIframe.createCallObject({
    audioSource: true,
    videoSource: [FLAG],
});

Changes required in vapi api

1. Add a videoRecordingUrl to the response when a request is made to the [Get Call](https://docs.vapi.ai/api-reference/calls/get-call) endpoint

or

2. Ensure that existing recordingUrl returns .mp4 recording from Daily.co

[nikhilro]

thanks, resolved in #38. will be available soon!