Add strings for new CSP videos
Add strings for new CSP videos

Adding strings for the 6 CSP videos so they can be referenced in levels
ty-po/code-dot-org,dillia23/code-dot-org,pickettd/code-dot-org,pickettd/code-dot-org,ty-po/code-dot-org,rvarshney/code-dot-org,rvarshney/code-dot-org,pickettd/code-dot-org,rvarshney/code-dot-org,ty-po/code-dot-org,pickettd/code-dot-org,ty-po/code-dot-org,dillia23/code-dot-org,dillia23/code-dot-org,ty-po/code-dot-org,rvarshney/code-dot-org,ty-po/code-dot-org,dillia23/code-dot-org,dillia23/code-dot-org,pickettd/code-dot-org,dillia23/code-dot-org,ty-po/code-dot-org,ty-po/code-dot-org,pickettd/code-dot-org,rvarshney/code-dot-org,rvarshney/code-dot-org,rvarshney/code-dot-org,dillia23/code-dot-org,dillia23/code-dot-org,pickettd/code-dot-org,pickettd/code-dot-org,rvarshney/code-dot-org