Add more TS Algorithms videos

[bonham000]

This PR:

• Add more videos for the Basic Algorithms challenges.
• Update the challenge title to a) not render the mobile caret icon and b) not render the editable text outside of Codepress to try to avoid the error (see below notes).

Notes:

I found that the app fails to load in a FB app generated web preview, and produces an error report like this:

{
componentStack: 
    in Blueprint3.EditableText
    in t
    in WorkspaceComponents__StyledEditableText
    in div
    in h1
    in t
    in WorkspaceComponents__ChallengeTitleHeading
    in div
    in Unknown
    in d
    in div
    in div
    in t
    in WorkspaceComponents__WorkspaceMobileView
    in div
    in t
    in WorkspaceComponents__WorkspaceContainer
    in div
    in t
    in WorkspaceComponents__PageSection
    in div
    in t
    in WorkspaceComponents__Container
    in t
    in t
    in d
    in t
    in t
    in Unknown
    in d
    in div
    in f
    in t
    in d
    in t
, 
error: {
message: Minified React error #185; visit https://reactjs.org/docs/error-decoder.html?invariant=185 for the full message or use the non-minified dev environment for full errors and additional helpful warnings., 
name: Error, 
stack: 
Error: Minified React error #185; visit https://reactjs.org/docs/error-decoder.html?invariant=185 for the full message or use the non-minified dev environment for full errors and additional helpful warnings.

We have a lot of these errors in Sentry, so they may be coming from people opening the app on mobile devices. I'm not sure exactly how/why, but that stacktrace appears to indicate it has something to do with the EditableText component, which we don't need to render outside of Codepress. I removed that in the PR here, and replaced it with the regular Text component instead.