It's true: Twitter is making changes to its 140-character limit, as links, photos and @replies will no longer be counted.
It is important to clarify from the outset that @replies or responses will now count to the limit of 140 social characters, instead they will be counted in the original tweet with @mentions.
Twitter hopes that this will help people get more involved, and have more meaningful dialogues. In chained responses with many people (@mentions), responses were getting smaller until conversations went away.
So, photos, videos, or any other will no longer count towards the 140 character limit. But according to the social network, this will only apply to media that you upload directly to Twitter, as links from Instagram, for example, will still count.
Twitter is also adding one button retweet στα τα δικά σας μηνύματα, ώστε να μπορείτε να επανεμφανίσετε παλαιότερο content.
As for the need to @mention to someone when you start a tweet with a reference - forget it. Every tweet with a reference or not - will reach your entire "audience".
All of the above changes will appear over the next few months as Twitter gives developers the opportunity to make the necessary changes to applications them before the features are released to the general public.