I tried Joikuspot, but not working somehow.
Free wor, have to pay kah? Forgotten where I downloaded from

To make Mobile Hotspot work, what I do is first make sure internet already connected, then click "Start" button.
Then it will prompt that cannot connect to blablabla, ignore it.
Then wait for a while (maybe 5 or 10 seconds) and it will say something like "Started".

Try using KMPlayer software for your videos.
I dun feel much (if any) frame loss for video files of around 1.xx gb.

For those using DynDNS, try check if your router supports it from its firmware.

This is a much cleaner approach, and your router will automatically update your IP whenever your IP changes.
Plus, you won't be needing any background software on your PC to be running.

Linksys routers do (DDNS), but only certain models.
Not all models of router firmware is compatible, so beware!
I have once used an incompatible DDNS router firmware, and my DynDNS account was disabled, with specific reasons pointing to incompatible client update (using my Dlink NAS).

You can actually check the compatible router models from DynDNS (I think).