Preview attached video in Trello card?

[Grigory Entin]

Is it possible to preview an attached video in a card? If so, what are the requirements for the format and etc.? 

Quite often I'm making screencasts and attach them to cards, but I don't see a way to preview them without downloading... I tried .mov, .m4v and etc.

[Krisztian Kovacs]

Hi,

the only preview I can recall is the youtube one. If you paste a link into a comment, you can watch the video directly on youtube.

would it be viable for you to upload stuff like that?
So upload the mp4 to youtube, share as 'unlisted'.

Cheers,
Krisz

[Grigory Entin]

Thanks, yes, I understand that I can upload to youtube and get it previewed in Trello. But this sounds completely counterintuitive to me and not the thing I want to do and spend time on (opening youtube, uploading, getting the link, pasting the link to trello instead of just just attaching the video). It raises security concerns over using youtube and etc. So it's just a question of convenience for me. I'm not sure but JIRA probably has it as well.