feat: Added video, better link to form (#2131)

<!-- CURSOR_SUMMARY -->
> [!NOTE]
> Embeds a YouTube video in `actor_validation.md` and makes a small
wording adjustment in `what_software_an_actor_can_be.md`.
> 
> - **Docs (Academy)**:
> -
**`sources/academy/build-and-publish/actor-ideas/actor_validation.md`**:
>     - Embed a YouTube video below the introduction via an `iframe`.
> -
**`sources/academy/build-and-publish/actor-ideas/what_software_an_actor_can_be.md`**:
>     - Minor wording tweak to the Actors description sentence.
> 
> <sup>Written by [Cursor
Bugbot](https://cursor.com/dashboard?tab=bugbot) for commit
bf43769. Configure
[here](https://cursor.com/dashboard?tab=bugbot).</sup>
<!-- /CURSOR_SUMMARY -->

Author: jancurn

sources/academy/build-and-publish/actor-ideas/actor_validation.md

@@ -8,6 +8,8 @@ slug: /build-and-publish/actor-ideas/actor-validation
 
 Before investing time into building an Actor, validate that people actually need it. This guide shows you how to assess market demand using free tools and research techniques.
 
+<iframe width="560" height="315" src="https://www.youtube.com/embed/00PA7a548W0" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" allowfullscreen></iframe>
+
 ## Assess your motivation
 
 Ask yourself: _Do you want to build this?_

sources/academy/build-and-publish/actor-ideas/what_software_an_actor_can_be.md

@@ -12,7 +12,7 @@ Learn what kind of software tools are suitable to be packaged and published as A
 
 ## What can you build as an Actor
 
-[Actors](https://docs.apify.com/platform/actors) are a new concept for building serverless micro-apps, which are easy to develop, share, integrate, and build upon.
+[Actors](https://docs.apify.com/platform/actors) are a new way for building serverless micro-apps, which are easy to develop, share, integrate, and build upon.
 
 They are useful for backend automation jobs, which users set up, integrate into their workflow, and let run in the background, rather than consumer-facing applications that users need to interact with.
 
@@ -191,7 +191,7 @@ Competition motivates developers to improve the code. You can still build the Ac
 
 ### Submit your own ideas
 
-You can submit your own Actor ideas through the [Ideas submission form](https://apify.typeform.com/to/BNON8poB#source=ideas). Provide clear details about what the tool should do and how it should work.
+You can submit your own Actor ideas through [this form](https://apify.com/ideas?modal=ACTOR_IDEA). Please provide clear details about what the tool should do and how it should work.
 
 ## Find ideas from other sources