The three most widely followed standards of video tapes are NTSC, PAL and SECAM. All variations of these standards followed anywhere in the world is a combination of two or all of these standards. When the first colour TV was discovered, the NTSC system was introduced in United States and Canada way back in the year 1953.
Among the eastern countries, Japan with the obvious influence of United States and its nearness to North America also uses the NTSC standard that uses 525 lines frame to play the video tapes. PAL, the short form for Phase Alternating Line, was introduced in the European Countries in 1960 and immediately gained popularity.https://onlineconvertfree.com
The bandwidth of PAL and SECAM standard, that is used in France, are the same and their line frames match too. But SECAM standard transmits colour signals sequentially. NTSC standard is not popular outside the North American countries and SECAM is used only in France and its earlier colonies. Rest of the world uses PAL and even the South American countries use some variations of it.
Compatibility is the main issue involved in the choice of a video converting VCR. Viewers in North America will opt for a video converting VCR that will enable them to play video tapes with PAL or SECAM standards to be watched on their NTSC TV. Similarly and European or Asian viewer will like to play NTSC video tapes on their PAL compatible TV and these can be achieved with video converting VCRs. In case of the multi-system VCRs, the companies will require the buyer to purchase some PAL/NTSC video converter that would replace a multi-system TV, which becomes otherwise a necessity. There are also systems with the feature of a direct converter that converters all incompatible signals into device friendly signals making viewing possible.