Can You Find All 25 Easter Eggs in This YouTube Rewind Video?
You have to do more than watch closely, too. This video uses YouTube’s annotations feature to embed stuff within the video. This means the hidden footage can only be uncovered by sliding your cursor over the video and clicking on the boxes that suddenly appear. Each box leads to an additional unlisted video.
If you need help, Mashable has listed all the Easter eggs here. But no fair peeking unless you’ve given it a good shot first.