Cannot save to m3u8 anymore (Chromecast involved)

Hello everybody,

I'm using a spanish website (mitele.es) to watch TV and recently i've sent my tablet to the repair center and since then I'm not able to save streams to m3u8. I was using the downloaded m3u8 files to watch my programs on my TV via Chromecast.
Here is what I was doing before :

1- Open Chrome and launch the website on my tablet (Lenovo S6000F - Android 4.2.2) and then launch the video
2- Hold my finger for 1 second on the video and then select : "save the video" ( then a m3u8 file is downloaded on my Tablet)
3- Open the file and select "VegaCast" app to send the file to my Chromecast.

These steps helped me to watch my programs on my TV using Chromecast, but now when I hold my finger on the video the system displays the "Cut/Paste" banner.

Any idea why it's not working anymore. Any idea for a workaround to save streams to m3u8 files ?

Thank you very much.