Takeaway: Use the MP4 file type to keep quality and reduce file size.
How do I reduce the MB size of a file?
Remove unnecessary images, formatting and macros. Save the file as a recent Word version. Reduce the file size of the images before they are added to the document. If it is still too large, save the file as a PDF.
How do I reduce file size when reducing?
The simplest is to re-save your file as a reduced-size PDF. In the latest version of Adobe Acrobat, open the PDF you wish to re-save as a smaller file, choose File, Save as Other, and then Reduced Size PDF. You’ll be prompted to select the version compatibility you need and then you can click OK to save.
What file is smaller than JPEG?
For graphics of only a few colors, GIF can be much smaller than JPG, with more clear pure colors than JPG). Indexed Color is described at Color Palettes (second page of GIF link below). PNG can replace GIF today (web browsers show both), and PNG also offers many options of TIF too (indexed or RGB, 1 to 48-bits, etc).