I'm doing some testing to see what the best format / upload site is.

Original: .gif file, 823KB
Auto-converted by Lemmy to: .mp4, 138KB

Desktop

web:
Thumbnail? no, Loads in post? yes, Loop? no
alexandrite:
Thumbnail? no, Loads in post? no, Loop? no
photon:
Thumbnail? no, Loads in post? yes, Loop? no

Mobile

sync:
Thumbnail? no, Loads in post? no, Loop? yes
voyager:
Thumbnail? no, Loads in post? yes, Loop? yes
connect:
Thumbnail? no, Loads in post? yes (for 1 loop), Loop? yes (when loaded separately)
liftoff:
Thumbnail? no, Loads in post? yes, Loop? yes
jerboa:
Thumbnail? no, Loads in post? no, Loop? no (have to load in a browser)

I don't have access to every front-end and mobile app available. Please share your experiences with whatever it is you use. Thanks.