I would like to include a widget into my theme where it might be possible to incoporate a video slider in homepage embeding videos or audio files from other site such as (youtube, vimeo,etc..) Please, let me know where I can get the php code to add to my theme.

Kind regard

https://www.google.com/search?q=wordpress+video+slider+widget&

If you did, then a more useful question might be “Having looked at X, Y, and Z plugins to solve my problem of xxxxxxxx, I didn’t find what I need. Do you have any better suggestions?”