This is more of a white-hat question, but I suppose could be useful to black-hat as well. I haven't been able to find a definitive answer as to how short videos effect monetized earnings. I have a channel that had a total of 7 videos that had earned $75 in November and $135 in December. Average video length of these videos is around 2-5 minutes. Granted one of the videos brings in 85% of the monetized earnings, they were all getting a cumulative view count of around 1.5k/day. I decided to branch out in this same channel and create shorter videos that are relevant to the channel (added 40+ videos), but these videos are only 20s to 60s long max. I uploaded these at the very end of December (29th-31st) and since I'm getting around 7k views/day (+~500%) from everything which is a nice little jump. The only problem is my estimated earnings per day is still right where it was before, if not a little less. Let me say I've only been youtubing for 2 months now, but this got me wondering a few things about adsense: 1) Is the length of the video a factor whether a view is considered for certain types of auction ads or not? Ex. Will a TrueView In-stream ad (full-screen skip-able ad) be less likely to show on a shorter video? This seems to be where a bulk of my previous earnings came from (much higher CPM). 2) As far as the bottom overlay ads which usually start around 10-15s in a video, is there a threshold of time where they have to be visible before they are counted as a monetized view, or is it simply "the ad was shown and you get paid for it." A lot of these new 30-60s videos are showing these ads but near the middle to end of the video. 3) Also... I'm hoping this is true... Since I uploaded right at the end of the month (or because they're new videos), am I being subjected to a lag period where "real estimated earnings" are just not yet being reported? As of the today the 3rd, there is still "no data" available for any of January, but the 29th-31st earnings numbers seem low compared to previous days with 1/7th the views. Thanks for any comments and I will report back on any findings and/or updates on my end!