That's a tricky one with movie files as they tend to be much larger than ebooks.

Mediafire can cope with up to 4gb for free accounts so that should cope with most 1080p mp4 files which usually come in around 1.3 - 2.4 gm.

So all you have to do is go to https://www.mediafire.com/

and click on "Upload files now" then drag and drop the file you want into the box. It will then upload and check it (likely to be quite slow with a big file). When it's finished it will give you a link which you can copy and paste to allow others to download the file.

There are other options, like https://www.file.io/ which is a similar deal; drag and drop the file then it spits out a link which you copy and paste. Same 4gb size limit.

If you want to have faster download options then you are getting into paid services and I don't use any of them so have no idea about options.