presentism (the doctrine that the Scripture prophecies of the Apocalypse (as in the Book of Revelations) are presently in the course of being fulfilled) populism (the political doctrine that supports the rights and powers of the common people in their struggle with the privileged elite) pluralism (the doctrine that reality consists of several basic substances or elements) pacificism; pacifism; passivism (the doctrine that all violence in unjustifiable)
YouTube's streaming video website supports several file formats for users to upload their videos. With the vast number of video formats available, however, you may need to use a specific program to convert your video to the correct filetype. One of the most common digital video formats is MPEG4, which YouTube supports for uploads. MPEG4 files can be created and exported using the free VLC media player. Other supported file formats include WebM, AVI, 3GPP, MOV, MPEGPS, WMV and FLV. Convert your videos to the MPEG4 format for upload to YouTube.
Above are the best YouTube video size dimensions for uploading. For those video files in 4:3 aspect ratio, YouTube player will automatically display videos with pillar boxes or letter boxes to play videos properly. This is why some YouTube users will find black bars on the sides of YouTube video.