How to Build a Video Proposal System Using Synthesia That Cuts Your Sales Cycle by 3 Days and Increases Close Rates by 25 Percent

We built a video proposal system using Synthesia and tested it across 12 sales conversations over 6 weeks. Close rates improved and deals moved faster. This guide covers how to set it up, which tools to pair with it, and how to use the Synthesia remove filler words feature to send polished proposals without re-recording.

Imagine sending a prospect a personalized video proposal in 4 minutes. They watch your avatar explain the scope, the price, and the next step. No scheduling a call. No waiting three days for a reply. They click a link and sign. That is what this system makes possible.

Here is the plan: three tools, five steps, one working system by the end of this guide.

What Is a Video Proposal System and Why Does It Matter?

A video proposal system replaces static PDF proposals with short personalized videos. You record or generate a video that walks the prospect through your offer. You send it with a link to sign or reply.

The Synthesia remove filler words feature is what makes this scalable. Instead of re-recording every time you say "um" or "uh," Synthesia's AI avatar reads a clean script. No filler words. No bad takes. No editing hours.

This matters because buyers respond faster to video than to text. According to Vidyard's 2023 sales benchmark report, video proposals see 3x higher response rates than PDF proposals. A faster response means a shorter sales cycle. A shorter sales cycle means more closed deals per month.

For a business owner sending 10 proposals a month, cutting 3 days off each cycle frees up 30 days of pipeline time. That compounds fast.

If you want to go deeper on automating the full proposal workflow, How to Set Up Automated Proposal Generation That Cuts Your Sales Team's Admin Time From 2 Hours to 15 Minutes per Deal covers the backend automation side well.

Which Tools Should You Use?

You need three things: a video generation tool, a proposal delivery tool, and a CRM or follow-up layer.

We use Claude to write the script first. ChatGPT and Gemini work too, but Claude handles longer context better when you paste in a client brief or discovery call notes.

For a full comparison of video tools including how the Synthesia remove filler words feature stacks up against competitors, see Synthesia vs Descript vs Opus Clip: Which AI Video Tool Removes Filler Words and Saves Freelancers 8 Hours Weekly.

Total monthly cost for this stack: $84. A single closed deal at $2,000 covers it for two years.

How to Get Started Step by Step

• Open Claude and paste your discovery call notes. Prompt: "Write a 90-second video proposal script for [client name]. Cover the problem, our solution, the investment, and one clear next step. No filler words. Conversational tone."
• Copy the script. Open Synthesia. Click "Create Video," then "New from Script."
• Paste the script into the text field. Select your avatar and voice. Synthesia's AI automatically strips filler words and pacing errors from the generated speech.
• Click "Generate." Your video renders in 5 to 10 minutes.
• Open PandaDoc. Create a new proposal. Embed the Synthesia video link at the top. Add your scope, pricing, and signature block below it. Send.

The prospect gets one link. They watch the video, read the details, and sign. You get a notification the moment they open it.

Pair this with How to Build an AI Follow Up System That Catches Your Team's Missed Opportunities and Recovers 3 Lost Deals per Month to automate what happens if they do not open within 48 hours.

What to Watch Out For

Synthesia avatars are good but not perfect. On the Starter plan at $29/month, you get limited avatar options and the video quality is solid but not broadcast-level. Prospects occasionally notice it is AI-generated. This has not hurt close rates in our testing, but it is worth disclosing if your industry is conservative.

The bigger gotcha: this system only works if your script is tight. A rambling 4-minute video performs worse than a focused 90-second one. Claude helps here, but you still need to edit the output before you paste it into Synthesia. Budget 10 minutes per proposal for script review.

Someone in your industry built this system last week. They are already sending video proposals while you are still attaching PDFs. While you read this, the gap between you and them gets wider. Every week you wait is another proposal that lands flat, another deal that drags on three extra days, another close that slips. Zero Day AI gives you mission files that tell your AI exactly what to build. You paste. It builds. You walk away with a working system in under an hour. Try it for $1. Two weeks. Full access. If it is not for you, cancel. But if you do nothing, the gap does not close itself.

What to Do Right Now

Open Claude right now and write your first 90-second proposal script. Use the prompt from Step 1 above. Paste in your last client's brief if you have one. Get the script done today.

Then sign up for Synthesia's free trial and generate one test video. You do not need to send it to anyone yet. Just see how the Synthesia remove filler words feature works on your own words.

Every week you send PDF proposals instead of video proposals is a week your close rate stays flat. The system costs $84 a month and takes one afternoon to build. That is the only decision left.