KAMPALA, Uganda — Uganda’s Public Enemy No. 1, Joseph Kony, became an overnight Internet sensation to the rest of the world this week, but many here knew little or nothing about the explosive online campaign.

Internet access was one reason. Only 10 percent of Ugandans use the Internet, and Web traffic is slowed by routine power failures and poor maintenance. Many young residents of the capital are computer savvy, but even for them downloading a 30-minute video like the one that Invisible Children, a San Diego charity, created would be a frustrating exercise.

“It is there, I have seen it on my wall, but I haven’t had time,” Adam Seif, 23, a business student at Kampala International University who is plugged into the social-networking scene, said of the “KONY 2012” video, which has attracted more than 70 million views on YouTube since it was posted on Monday.

Among expatriates and plugged-in Ugandans here, the video has become the subject of animated discussions, with debates breaking out over the accuracy of the online campaign and the intentions of the charity that prepared it.