Which software can act as a good alternative for Adobe Flash Player?
It should be smooth and fast like flash player.
Major sites such as YouTube has switched over to using HTML5 for Videos, so any browser will support Videos without the need for Flash or a replacement. The standards for this practice is on W3Schools. Also, there is mobile support with this method also.
Sorry, but there is more details within HTML5 Rocks for compatibility, how to actually add video into HTML code, and different important options for it also.