A client testimonial video works when a real client explains, in their own words, what changed after working with you. To film one well you need the right client, three or four open questions, clean sound, some footage of the client at work, and written consent that says where the video will be used. The rest is editing.
Below is how I plan and shoot testimonials for B2B companies in Barcelona, plus the legal step that Spanish law adds and many guides from the US skip. The short version from my own shoots: pick a person the camera likes, warm them up with small talk, and light the face like a film, not like an office.
Why a client testimonial video is worth filming
Buyers believe other clients more than they believe your own marketing. In Wyzowl's 2026 survey, 57% of video marketers said they had already made testimonial videos, and 89% of consumers said video quality affects how much they trust a brand. Wyzowl also reports that 9 in 10 people trust what a customer says about a business more than what the business says about itself. These are survey figures from a video company, so treat them as a signal rather than hard proof, but they match what sales teams see: a short client story answers the questions a buyer has before the call.
One shoot also gives you more than one asset. The main video goes on your website and in sales emails, and short vertical cuts go to LinkedIn, ads and Instagram.
Who to film: picking the right client
A client with a clear result. Numbers are great (time saved, leads, sales), but a concrete before and after is enough.
Someone who chose you over alternatives. They can explain why, which is exactly what a new buyer wants to hear.
The person who felt the change. In B2B that is often the manager who used your service every week, not the CEO who signed the contract. If you can, film two people in different roles.
Experience on camera isn't required, but the person should speak easily and want to be filmed. A good story told by someone who was pushed into it still looks forced. More on that in my take below.
The questions to ask in a testimonial interview
Keep the list short. Four or five open questions give you more usable material than fifteen narrow ones:
What was going on in your business before we started working together?
What made you hesitate, and what made you decide?
What changed? Give me a specific example.
What was it like to work with us day to day?
Who would you recommend us to, and why?
Ask the client to answer in full sentences that include the question ("Before we worked with them, we..."), because the interviewer's voice is cut out in the edit. Send the questions a few days ahead so nobody is caught off guard, but don't let anyone read answers from a sheet. A memorised answer sounds like an ad, and viewers notice.
Setting up the shoot: sound, light and location
Sound first
People forgive average picture far more easily than bad sound. Use a lavalier microphone on the speaker, and if possible a second source (a shotgun mic or a backup recorder). Pick a room without air conditioning hum, open-plan chatter or a coffee machine.
Light and framing
Soft light from a window or a large source to one side of the face, and a background that says something about the client's business: their office, workshop, shop or team. Two cameras (a medium shot and a close-up) make it easy to cut between answers without jump cuts. If you plan vertical clips, frame with enough space so the shot can be cropped to 9:16 or 4:5.
Location
Film at the client's place when it looks good. It is more convincing than a studio and easier for the client. If their office is cramped or noisy, a quiet meeting room or a small studio is the better choice.
B-roll: what makes a testimonial watchable
A talking head for two minutes is hard to watch. Plan 30 to 60 minutes of extra footage of the client at work: talking with their team, walking through the office, using your product or meeting customers. Over that footage you can lay the strongest lines of the interview, and the video starts to feel like a story instead of a statement.
How long should a testimonial video be?
Sources disagree. Wyzowl's survey says most people find 30 seconds to 2 minutes most effective, while some guides allow up to 3 minutes for a full case story. A practical split:
Main video: 1.5 to 3 minutes, for your website and sales follow-ups.
Short cuts: 20 to 60 seconds each, one idea per clip, with subtitles for people watching without sound.
Consent and image rights in Spain
This is the step most English-language guides skip. In Spain, using someone's image or voice for advertising without permission counts as an unlawful intrusion under Organic Law 1/1982 (article 7.6). The law asks for express consent (article 2.2), and that consent can be withdrawn at any time, with compensation for any justified damage the withdrawal causes (article 2.3). A recognisable person on video is also personal data under GDPR, so the Spanish data protection authority (AEPD) applies too.
Courts read consent narrowly. In a 2017 case in Madrid, an employee who agreed to photos for design tests later found her face printed on merchandise the company sold; the court ruled that her consent covered only the original purpose (summary by Ius Laboris). For testimonials that means:
Get written consent from everyone recognisable, including the client's staff in the b-roll.
List the uses: website, social media, paid ads, sales presentations, and for how long.
Keep the signed form with the project files.
This is general information, not legal advice. For an ad campaign with a large budget, have a lawyer check the release.
My take: what makes a testimonial work on camera
I'd put the choice of person first. Agree on someone who talks easily and looks good on camera. Like it or not, a testimonial is part of a show, and in our trade we say the camera loves some people and not others. Just as important, the person has to want to do it. If someone is filmed because they were told to, viewers will see it.
Before the first question I spend a few minutes on small talk: how their day started, how they got here, what they saw on the way, any good news. Once the person relaxes and trusts the interviewer, the answers come out naturally. That trust is what turns a list of questions into a conversation.
On light, I film testimonials and interviews in a cinematic style. The camera sees the darker side of the face, and the brighter side is turned away from the lens. That gives the face shape and depth, so the picture looks far less flat than an evenly lit office shot.
Who asks the questions depends on the project. Several times the client sent me a list and I ran the interview myself. When the interview isn't in my native language, or the topic is very specific to the client's industry, I'd rather have someone from the client's side act as the host, because they know the subject. Consent works the same way: we agree in advance who collects the signed release, and if a person from the client's team comes to run the shoot, they usually take care of it.
Common mistakes
Writing a script for the client. It kills the one thing a testimonial has: sincerity.
Filming only the interview and no b-roll.
Asking yes/no questions.
Bad sound because the room "looked nice".
No signed consent, which turns a finished video into one you can't use in ads.
FAQ
How much does a client testimonial video cost in Barcelona?
Prices vary with crew size and editing. My client testimonial package is €490 + VAT for one client, up to two hours on site, a finished video and two vertical clips. For a wider view of local prices, see video interview and podcast costs in Barcelona.
Can I film a testimonial on a phone?
Yes, for a quick social clip a phone with an external mic is fine. For a video that sits on your homepage and in ads, a two-camera setup with proper sound looks more trustworthy.
What if my client is nervous?
Start with easy questions, take breaks and film more than you need. The edit keeps the best answers.
Can I watch the shoot if I'm not in Barcelona?
Yes. With remote live viewing you see and hear the interview from your office and can ask for another take or a new question.
Have a happy client in Barcelona and nothing to show for it beyond a quote on your website? Tell me about them, and we'll plan a testimonial that answers your buyers' questions.