how i see the thumbnail on the file or does it support Jpg thumbnail? it is very difficult to find the video 

You can try using xbvr if you want thumbnails (it also supports video previews). Adding support for custom image thumbnail files is on the to-do list.

Here are steps to setup xbvr if you're interested:

1. Download xbvr from here (make sure to select the correct one for your computer):https://github.com/xbapps/xbvr/releases

2. Run xbvr on your computer.

3. Launch your computer's web browser. Type inhttp://127.0.0.1:9999 to access the xbvr UI.

4. Go to xbvr options and add your folders with your videos.

5. Go to scrapers and add the sites that your videos came from.

6. After the scrapers finish running, go to files. Your videos should show up under matched. If they don't, go to unmatched, and then click on the match button, and select the correct scene.

7. Go back to xbvr options. Click on players. Make a note of the xbvr IP address, which probably starts withhttp://192. If you want to add the ability to delete files and sync data from HereSphere, click on the Heresphere tab, and then enable the corresponding toggles.

8. Launch HereSphere, go to the web browser, input the xbvr IP address from step 7. Press the web api button that looks like a play button on 4 tiles to the left of the input box.

9. Once the HereSphere web UI loads, click on a thumbnail to play the video. If you couldn't match some videos, click on the "unmatched" button near the top of the HereSphere web view UI.

Thanks for your guidance. how to see the heatmap of funscript on the player?

Heatmaps for funscripts will be added with the big UX update in the upcoming months.