Fun fact Robert Maxwell established the for profit scientific publishing companies. If that name seems familiar he is the father of Ghislaine.

https://www.iheart.com/podcast/105-behind-the-bastards-29236323/episode/part-one-robert-maxwell-how-ghislaine-274165028/

Q: But I need to share with family who aren’t technical
A: IINA (Mac) or mpv.net (Windows) give them a normal GUI that uses MPV underneath. Or just… teach them? play movie.mkv isn’t rocket science.

Spoken like somebody that hasn’t been stuck with family tech support or tech support in general.