How do you decide which video are the most popular ones?

We select videos based on their popularity on video hosting sites. This popularity is determined by view count. We select the top 10% best videos from each channel independent of the other channels. In other words, we don’t pool all the videos from all the channels together and make our selection from there, as this would result in one or two channels dominating our site. In some cases we pick less than 10% because some publishers produce a very large quantity of videos, and again we don’t want a few channels dominating.


Why sort by view count instead of likes?

Most of the videos come from YouTube, which sorts videos by popularity based on view count only.


How do you decide which channels to select from?

We select the videos from websites that are primarily engaged in hosting conferences, and from a select number of highly reputable post-secondary institutions, provided they have a channel that is dedicated to publishing talks.


Are you actually allowed to just post videos from these other sites?

Yes. All of the sites we use upload their content to Youtube and Vimeo, and these are currently the only hosts we embed videos from. The ToS from both hosts makes it very clear that we have the right to embed any video on their site that is uploaded with embedding enabled. This can be found in section 6.C. of YouTube’s ToS, and section 9.1 of Vimeo’s ToS.


Why is there advertising on some of the videos?

We currently do not have any advertising on our site. The advertising you see is attached to the embedded video itself. This means that the revenue, even if the ads are clicked while viewing our site, still goes to the original publisher. If we ever do have ads they will be as non-intrusive as possible.


Who writes the descriptions for the videos?

The description is taken from the URL of the video on the hosting site where the video is located; however, credit is usually given to the publisher’s website.


Do you include online courses and OpenCourseWare(OCW)?

No, we’ve decided not to include any full courses. For a list of sites that offer online courses you can check our other site here; and for a list of universities with OCW, you can check here.


What is the difference between categories and tags at the bottom of a video?

We use categories to group videos into broad topics for ease of navigation. We then use tags to group them into more specific topics. For example, a category may include something like “Physics” while a tag would include something like “String Theory.” For anything more specific, you can also use the search function in the top right.


What is the difference between the “added on” date, and the “published” year?

The “added on” date, as seen directly under a video, is the date that the video was added to this site. The “published” year, as seen under the video description, is the year that the video was originally published by the publisher.


Are you open to suggestions?

Always! We are definitely open to suggestions on how to improve the site, or additional categories to create. Contact us here to give us your ideas. When it comes to videos however, we have tried to create a site that is as unbiased as possible, so we take a statistical approach to content inclusion. In other words, the videos on this site are not even really chosen by us, they are chosen by YouTube and Vimeo users. So we are not as open to video suggestions.