Remove reference to BTC, update video link

README.md

@@ -11,13 +11,13 @@ Mastodon is a **free, open-source social network server** based on **open web pr
 
 Click on the screenshot below to watch a demo of the UI:
 
-[![Screenshot](https://i.imgur.com/pG3Nnz3.jpg)][youtube_demo]
+[![Screenshot](https://i.imgur.com/qrNOiSp.png)][youtube_demo]
 
-[youtube_demo]: https://www.youtube.com/watch?v=YO1jQ8_rAMU
+[youtube_demo]: https://www.youtube.com/watch?v=IPSbNdBmWKE
 
 **Ruby on Rails** is used for the back-end, while **React.js** and Redux are used for the dynamic front-end. A static front-end for public resources (profiles and statuses) is also provided.
 
-If you would like, you can [support the development of this project on Patreon][patreon] or [Liberapay][liberapay]. Alternatively, you can donate to this BTC address: `17j2g7vpgHhLuXhN4bueZFCvdxxieyRVWd`
+If you would like, you can [support the development of this project on Patreon][patreon] or [Liberapay][liberapay].
 
 [patreon]: https://www.patreon.com/user?u=619786
 [liberapay]: https://liberapay.com/Mastodon/