[Device Reviews and Information] YuriRM:
You already have the sourcecode of two stereo3d videoplayer apps for Takee 1 that do that thing with local videos. Remember?

francioshu/3DVideoPlayer

https://github.com/francioshu/3DVideoPlayer

JongLim107/JLPLayer

https://github.com/JongLim107/JLPLayer

There are plenty github stereo3d videoplayer

https://duckduckgo.com/?q=github+stereo3d+videoplayer&t=ffab&ia=videos

https://www.google.com/search?q=git...69i57.2237804296j0j7&sourceid=chrome&ie=UTF-8

NOTE - It is funny that more players are retrieved by DuckDuckGo than Google search engines.

Just found this one... but is not stereo3d.

lipangit/JiaoZiVideoPlayer

Android VideoPlayer MediaPlayer VideoView MediaView Float View And Fullscreen

https://github.com/lipangit/JiaoZiVideoPlayer

There are plenty FFmpeg apps in Google Play

https://play.google.com/store/search?q=FFmpeg&c=apps&authuser

Bino 3D for Windows has SBS to interleaved columns

http://bino3d.org/3d-videos.html

VLC Direct3D HSBS interlacing plugin

3D passive technology https://sourceforge.net/p/vlcinterlacedhs/wiki/Home/

YouTube Player library for Android, stable and customizable. The original library of YouTube by Google is buggy.

https://github.com/PierfrancescoSoffritti/Android-YouTube-Player

79 android programs for "3D" at SourceForge

https://sourceforge.net/directory/os:android/?q=3D

That is an important remark! Eye-tracking is used in several devices but are they compatible systems? It is likely that SuperD developed all existing chinese eye-tracking sytems. Thus, they may be compatible but Takee 1 has a more sophisticated hardware for that purpose.

The eight existing eye-tracking smartphones are Takee 1, Snail W 3D, Focalmax Maxphone T1, V5 K3DX-V5G, SuperD D1, Ivvi K5, DMZ DAMUZHI Thumb V3 / V3D, ARK BENEFIT M551 (SuperD D1).

List of 3D-enabled mobile phones

https://en.wikipedia.org/wiki/List_of_3D-enabled_mobile_phones#List_of_3D-enabled_mobile_phones

Most naked-eye devices do not use eye-tracking technology. Therefore, a separate version of the 3D YouTube app should also cater for them.

[MENTION=9189065]kano3d[/MENTION] can you help us with these questions, please?

kano3d is a power user of 3D holography. He owns seven naked eye smartphones, including SuperD D1 and interleaved column devices like ZTE Axon 7 Max, PPTV King 7s, Doogee Y6 Max 3D and some obsolete devices like Sharp Aquos SH80F, HTC EVO 3D and LG Optimus 3D.

kano3d is the author of a 3D Blog... http://www.tridimensional.info/

I would like to invite here Dr. Mrunal Gawade - PhD Computer Science. We have been talking by Facebook Messenger and email.

He is the CEO of HOLOFIL and he is fond of playing guitar too, just like Mich-C.

Mrunal Gawade is showing the HOLOFIL 3D holographic device at CES 2019.

He wants to buy a Takee 1 to investigate the SeeReal Technologies Holographic display based on eye tracking.

https://www.seereal.com/

Holographic 3D (H3D) designs are different from a common Stereoscopic 3D (S3D) display.

https://www.seereal.com/technology/

I have suggested to him both SuperD devices (SuperD D1 and Ivvi K5) as excelent alternatives to Takee 1, albeit not Holographic 3D (H3D). They are Stereoscopic 3D (S3D) with eye-tracking but SuperD has also developed innovative sub-pixel rendering technology, which means every pixel can be rendered according to the operator’s viewing angle, distance, and position. When 3D content is detected, the eye tracking engine inside the device tracks where a person is viewing the screen and passes that information to the sub-pixel rendering engine to make sure every pixel displayed is optimal.

https://www.holofil.com/

https://www.mrunalg.com/

https://plus.google.com/+MrunalGawade

HOLOFIL Launches android 3D model viewer app to load and interact with a random 3d model (obj/fbx/dae/3ds/ply/stl file formats) from the local storage and lets you do actions such as rotate, move, zoom to explore them further.

https://play.google.com/store/apps/details?id=com.Artosci.HOLOFIL

HOLOFIL-X 3D model animation exporter Android

https://play.google.com/store/apps/details?id=com.Artosci.HOLOFIL_X

AppWererabbit - is a nice tool to Export apk (allows custom backup name)

https://play.google.com/store/apps/details?id=com.aw.AppWererabbit&hl=en_US