non-MuseScore Q :: need mp4 player/editor

Please pardon this non-MuseScore Q, but, I figured that someone in this knowledgeable group could provide a good recommendation, and this is an *active* forum. Searching via google has not helped much.

I want/need a player of mp4 videos for my win7 PC that can

These are typically 10-15 min long videos of guitar fingering instructions.

Thanks for response to this "off subject" post.