networking - How to play pc media on TV via DLNA

I have following setup.... Pc with 2 usb and 1 ethernet port... Also I have win10 and linux mint on that pc..

Samsung on8 android 6(jio 4g sim) with Wi-Fi hotspot and data(internet)....ON.....

Samsung wave y (BADA os) with Wi-Fi On and connected to that hotspot... And also connected to pc via usb.. with 'usb tethering'...

Sony bravia led tv connected to same Wi-Fi hotspot..

Tablet (android) connected to same hotspot

Now I can Access Internet on pc.... Access internet (mainly YouTube) on Sony Tv Access internet on tablet. I also have installed Bubble UPnP on both android device.... And I can play media OF my Samsung On8 to Sony TV

As well as media OF tablet to Sony Tv.. Even Wave y (BADA os )has All share to play media to Sony TV on these setup...

Further I have xplore installed on both android.... It has feature called Wi-Fi file sharing ....you have to turn on Wi-Fi file server on one xplore and you can access its files on xplore on another device ... And when I turn on Wi-Fi file sharing it displays IP address and port number ... And with it I can access files on Chrome on myPC....

I hope you will understand this setup....

Now what I couldn't do is ....

I can't play media stored in my PC directly to Sony TV...with any UPNP app .....(can't do stream media from WMP or Vlc,or play to device)

I can not access shared folders and files of pc from my android phone or tablet..(in xplore and es file manager there is a tool called 'Lan' with which you can access shared folders on network.('you'.. may be.. can but I cant))

(My suspect:

Is this because I have used USB port instead of standard Ethernet port to connect to network?

If it is then why there is network connected icon is displayed in sys tray... Why internet Is accessible on PC..

Additional info: ifconfig displays inet address in usb0 interface...not in eth0. And i can view Sony bravia's dlna profile file (.xml) On chrome on my PC.. . ) I have these facilities (as well as limitation)on both Windows 10 and Linux Mint....

My questions are :

1: how can I access shared folder of pc running mint or windows from android device on this setup?

2: how to play media stores on pc to Sony TV directly ?

I don't want to use direct usb cable because if I do so my android' s touch goes CRAZY......

Answer

Your Wave Y is having two interface. wlan0 used for Wifi connection and Wifi Hotspot. rndis0 used for USB Tethering to PC when you use USB Tethering to PC,it will be displayed as usb0 interface on PC which acts like eth0. So Wave Y is acting as router between PC and Galaxy On8. Well These type of phone are not as powerful as compared to standard routers. For internet access it forwards PC's request to Galaxy On8 and Galaxy on8 will reply via SAME PATH. A ping from PC to Galaxy On8 will be successful, but reverse is not possible. because Wave Y will not forward communication FROM outside world (yes,your WiFi network too is considered as outsider) TO PC for security reason. So PC is not able to scanned from Your WiFi Network. If You have rooted Android Device then ,altering iptables will allow bidirectional communication from PC to Galaxy On8 and vice versa.