Ve zdrojovém textu je vidět jako příloha:

--Apple-Mail-BAE6720A-D132-435E-B3BC-6120052975C6
Content-Type: video/mp4;
name=VID-20210615-WA0010.mp4;
x-apple-part-url=997AEC93-C19F-48ED-BB80-664D5D061D4A
Content-Disposition: attachment;
filename=VID-20210615-WA0010.mp4
Content-Transfer-Encoding: base64

AAAAGGZ0eXBtcDQyAAAAAG1wNDJpc29tAAAAGGJlYW0BAAAAAQAAAAAAAAACAAAAAAC1rW1vb3YA
AABsbXZoZAAAAAAAAAAAAAAAAAAArEQAg9fCAAEAAAEAAAAAAAAAAAAAAAABAAAAAAAAAAAAAAAA atd.