Video Editing - Captions with Audio and Background Images

I need a professional to convert a YouTube link into an MP4 video. Initially, we will only be interested in the audio, but full video conversion will eventually be required.

Key Requirements:
- Download the audio and video from the YouTube link provided.
- Accurate real-time captions based on a provided text source.
- Use of nature or scenic images as the background, enhancing text readability and overall visual appeal.
- Use of a simple and classic style for the captions.
- Implementation of typewriter effect for transitions.

The final product should be a high-quality MP4 file suitable for WhatsApp and other digital platforms, using two different frame sizes.

Skills Needed:
- Video editing
- Familiarity with YouTube content
- Ability to create visually appealing video backgrounds
- Experience with captioning and implementing transitions.

The final product should include two different frame sizes: 1920 x 1080 and 720 x 1280.