Upload date
All time
Last hour
Today
This week
This month
This year
Type
All
Video
Channel
Playlist
Movie
Duration
Short (< 4 minutes)
Medium (4-20 minutes)
Long (> 20 minutes)
Sort by
Relevance
Rating
View count
Features
HD
Subtitles/CC
Creative Commons
3D
Live
4K
360°
VR180
HDR
12,655,184 results
Food insecurity, or the lack of access to enough nutritious food, is a complex problem. In the 21st century, even with all of our ...
89,780 views
2 years ago
Health economic evaluation is a tool that allows us to make decisions on the allocation of scarce resources. In this video, we will ...
168,170 views
3 years ago