https://tekeye.uk/html/html5-video-test-page

hi, all... well, do not work at all be there
and, some new from adobe flash player... they gonna stop it soon, around end 2020... and coucil to uninstall it right now.

but, without it, many web site will shift on HTML5 tech...
and then Otter

The videos on that page mostly seems to work OK in Otter here.

yep, DaveH, precisely... if you got adobe flash player... it certinaly work...

but ido not use Flash player... then it do not work here...

this is the reason why i do warn about it... soon, ADobe will abandon this technology... then... no video no more...

They're not using Flash.