What formats are supported to add Thumbnails?
Hello @Harish_Rao! Here’s a full list of the media file formats we support: https://support.shotgunsoftware.com/hc/en-us/articles/115000067353-Transcoding-services
What @jonjones said here.
And to be more specific here, you could not directly upload video onto thumbnail field. You are uploading the supported media format onto Shotgun and it gets transcoded automatically with a thumbnail image generated onto the thumbnail field. You could then click on the fimstrip thumbnail to play the transcoded media.
Of course, you could configure the thumbnail field to upload jpg, png still images as thumbnail. Check this one here for more information.