Accept file-like objects as input in all classes

[sohang3112]

Allow classes like moviepy.editor.VideoFileClip to directly accept file handles and file-like objects alongside filenames. This eliminates the need for intermediate disk storage, reducing latency and enhancing efficiency. Also, in case of large videos, saving them to disk may not even be possible.

Some examples of file-like objects that could be passed (in addition to filenames and normal file handles):

• io.BytesIO - useful when the video bytes are directly available in memory
• while using requests library to download videos, requests.Response.raw is a file-like object
• while using flask server, request.files["video"] is a file-like object that allows accessing user-uploaded files

[xaviernogueira]

I second this as valuable, especially when working with cloud providers.