Unless you already have access to a premium account (paid or free), the best way to bypass these restrictions is to use premium link generators. They create premium links, usually far faster and bigger than common ones (you can easily get files over 10GB). Some sites are specialized in streaming have embedded players. Kikisso provides a list of free and paid PLGs, showing characteristics as ssl support, download limits, rank, language support, link generation capacity, max file size. There is extensive information about each premium link generator, so you might take some time to read their specificities.
Uploadboost [UPB] is a file hoster: it hosts your files videos for free. You can then download them freely, unless they are too big. However, Uploadboost impose some restrictions, as no free download.
There isn't (until now) any Premium Link Generator for Uploadboost [UPB] !
Why don't you try premium link generators for another file hoster?