Hi @Odysseus,
I suggest you upgrade to the latest [v2.69.5] and retest. You can upgrade the version for this player by going to KMC->Studio, inputting the UI conf ID for it in the search box and then clicking on “update”.
You did not specify the player version being used but there was recently an issue with playback on Android, which was fixed in v2.69.2 [see https://github.com/kaltura/mwEmbed/releases/tag/v2.69.2].
If, after upgrading to the latest version, the problem persist, please open a ticket with our support team.
Thanks,