How can we play .smi extension files in video player

[AC Question]

I recently downloaded some videos from Youtube but cannot view it as they come with .smi extension which no videoplayer can play. Please help.

 

[Laura Knotek]

YouTube downloading apps are against the terms of service, unless you use the official YouTube app and save for offline use. http://forums.androidcentral.com/ask-question/547991-whats-best-safest-app-download-youtube-content-your-phone.html