Connected TV (CTV) is any television screen that connects to the internet and streams video content. This includes smart TVs with built-in streaming apps, television sets connected via an external device (Amazon Fire TV Stick, Chromecast, Apple TV, Roku), gaming consoles (PlayStation, Xbox), and set-top boxes with internet connectivity. The defining characteristic: the content is delivered over an IP (internet protocol) connection rather than broadcast, cable, or satellite.
For advertisers, CTV is the intersection of television's attention and digital's accountability. You get the big screen, the lean-back viewing environment, and the premium long-form content of TV — combined with the audience targeting, frequency control, and impression-level measurement of digital.
How does CTV work technically?
When a viewer presses play on a streaming platform, a sequence of requests fires before a single frame of video appears:
- The CTV app on the device sends a request to the streaming platform's CDN (content delivery network) for the video file.
- If the content is ad-supported, the app also sends an ad request — either client-side (CSAI) or server-side (SSAI) — to fetch an ad to insert into the stream.
- For programmatic ad buying: the ad request goes to an SSP (supply-side platform), which runs a real-time auction among DSPs (demand-side platforms) representing advertisers. The winning bid's ad creative is returned within milliseconds.
- The ad plays. The platform records an impression. If the viewer watches to the end, a video completion is recorded.
This happens every time an ad break occurs — which in a typical AVOD viewing session is several times per hour. Each impression is individually tracked, unlike linear TV where audience measurement comes from a panel extrapolation.
CSAI vs SSAI: why it matters
Client-side ad insertion (CSAI) inserts the ad at the device. Server-side ad insertion (SSAI) stitches the ad into the video stream on the server before it reaches the device. SSAI is harder to block with ad-blockers and offers a more seamless viewing experience, but is more technically complex. Most premium CTV inventory in India uses SSAI.
What counts as CTV and what does not?
This is a common source of confusion in planning meetings. Here is the clear cut:
| Device / surface | CTV? | Why |
|---|---|---|
| Smart TV (JioCinema app on Samsung TV) | Yes | TV screen, internet-delivered |
| Fire TV Stick connected to HDMI | Yes | TV screen, internet-delivered via streaming device |
| Laptop watching Hotstar | No | Not a TV screen — this is desktop OTT |
| Mobile watching JioCinema | No | Not a TV screen — this is mobile OTT |
| DTH set-top box (no internet) | No | Satellite delivery, not IP |
| Smart TV with DTH input active | No | Content is satellite-delivered in that mode |
| YouTube on a smart TV | Yes | TV screen, internet-delivered — YouTube CTV is significant inventory |
The key test: Is the content delivered over the internet to a TV-sized screen? If yes, it is CTV. If the screen is mobile or desktop, it is OTT but not CTV.
CTV vs OTT: what is the difference?
OTT (over-the-top) is the broader category. OTT means any video content delivered over the internet, bypassing traditional broadcast infrastructure — regardless of device. CTV is a subset of OTT: specifically the part that reaches a television screen.
Think of it this way:
- All CTV impressions are OTT impressions.
- Not all OTT impressions are CTV impressions — mobile and desktop OTT are excluded.
When a media owner reports "OTT reach," they are including mobile and desktop streams. When a buyer specifies "CTV-only," they want TV-screen inventory exclusively. These are different audiences, different CPMs, and different ad experiences. Always clarify which you are buying.
Why does CTV matter for advertisers?
Three reasons that hold across markets, including India:
1. Precision targeting at television scale
Linear TV reaches large audiences but with coarse targeting — age, gender, and market. CTV platforms know their logged-in users. JioCinema has Jio subscriber data. Hotstar has Disney+ account data. This enables content-genre targeting, device-type targeting, geographic targeting down to the city, and increasingly, interest and behavioural targeting. You can reach "households in Mumbai who watched cricket in the last 30 days" — that targeting does not exist in linear TV.
2. Impression-level measurement
Every CTV impression is counted individually. You know exactly how many times your ad played, whether it completed, and on what device in what geography. Compare this to linear TV, where audience figures come from BARC India's panel of roughly 50,000 homes extrapolated to a 900 million viewer universe. CTV measurement is more granular — though it comes with its own challenges around fraud, co-viewing, and cross-platform deduplication.
3. Programmatic buying infrastructure
CTV inventory can be bought programmatically through DSPs, via PMPs (private marketplaces), or through direct IO with platforms. This means CTV fits into the same buying workflow as digital — using the same data, the same creative management, and the same reporting. For agency trading desks, this is a significant operational advantage over the manual process of linear TV buying.
CTV in India: where we are today
India's CTV ecosystem is real but still maturing. A few grounding facts:
- Scale: India has an estimated 20–25 million connected TV households, concentrated in metro and Tier 1 cities [NEEDS SOURCE — cite MPA or FICCI-EY when available]. This is a small fraction of India's 300 million TV households, but it is the premium, high-income, high-engagement segment.
- Dominant platforms: JioCinema (post-Viacom18 merger with Star India assets) and Disney+ Hotstar are the two largest CTV environments for advertisers. SonyLIV and Zee5 are meaningful but smaller in CTV-specific reach.
- Live sport is the inflection point: IPL streaming on JioCinema established CTV as a serious media category in India. It demonstrated that Indian audiences would watch premium sport on a TV screen via streaming, and that advertisers would pay for it.
- Programmatic access is limited but growing: Most India CTV buying is still direct IO or platform-managed. Programmatic CTV (buying through a DSP against CTV inventory) is available but the supply-side fragmentation and measurement gaps make it harder to execute at scale compared to the US.
- Measurement gap: There is no unified India CTV measurement standard. BARC India covers linear TV. CTV impressions are platform-reported. Third-party verification (MOAT, IAS, DoubleVerify) has limited India CTV coverage. This is the most significant gap for serious buyers.
Common misconceptions about CTV
"CTV is just digital video on a big screen"
Not quite. CTV has different viewing behaviour (lean-back, longer sessions, co-viewing), different ad formats (non-skippable pre-roll is standard), different measurement (no cookies, device IDs are the identifier), and different content environments (long-form premium vs short-form social). Treating CTV as another digital video placement produces wrong targeting assumptions and poor creative.
"You cannot target on CTV in India"
You can, but the options vary by platform. Major platforms offer content genre targeting, device targeting, and geographic targeting. Behavioural and demographic targeting depends on the platform's first-party data and the buying method. It is more limited than US CTV targeting, but it is not zero.
"CTV and smart TV are the same thing"
A smart TV is a type of CTV device. CTV also includes streaming sticks, set-top boxes, and gaming consoles. A smart TV watching DTH is not delivering CTV content in that moment. The content delivery method matters, not just the hardware.