The duration mentioned above is effective for standard ad placement strategies. But in some cases, you can try combining approaches to your video ads based on telling a story. For example, launch a short ad reel announcing a more in-depth video, like one of our agency's clients, Uncle Vanya brand (Ruspole Brands), did.
The team launched a series of shorts called "Ivans who remember where they came from", which attracted the attention of millions of viewers and received many positive reviews. There was a short teaser for each movie. The project generated buzz in the digital market, because the reels were about 15 minutes long on average, while most videos at that time were no longer than 2 minutes. And even though, year after year, the trend is to make shorter and shorter promo reels for higher effectiveness, Uncle Vanya launched a second season of the project and increased the average reel duration to about 20 minutes. It got results comparable to the first season results.