I think Vtubers who tend to be younger sometimes use contractions like that as well? 
Sounds very likely, even ten years ago 60+ percent of the under-30 age groups thought it was fine, and vtuber conversation is the kind of casual spoken situation where it would be used.
I wouldn’t call it a contraction, though – it’s not a shortened version of something else, it’s a new suffix that didn’t exist in the language before.
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Is it? or just a more wider use of the -ら suffix?
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I guess you could look at it that way. I tend to prefer not breaking things down into the smallest possible pieces, though - I find things easier to remember that way.
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