Hi Sagar,
Many thanks for the update.
I just tested it out.
Unfortunately the app does not play any video
on my Poco X3 Pro Miui 12.5 device.

But I succeeded to upload a video into the pending area of 3speak.tv
Well I still don't know , how I can set the Title and the description of the video, cause this was missing in the upload process, but I am glad that at least I can now upload easily just an MP4 video without any problem and it also picks automatically a thumbnail picture...
I guess I can later still edit the title and description when it is fully transcoded into all the resolutions on the 3 speak platform....Do you know, if they will also support 240p resolution during transcoding, cause I am limited here on the campground to a lower mobile data rate.
Many thanks and best regards from Stefan.