ritikm gave a pretty detailed response to why they request those rights. To dismiss that explanation with "Streem is using this just to gather lots of content and sell it for profit" seems like unwarranted FUD.
Also, you may want to read that last TOS paragraph closer, especially the part about how they aren't relinquishing control of your data or their ability to copy/distribute it. You only read the first part of it, but ignored completely "The above licenses granted by you in User Content for which the Service does not provide you a means to delete or remove are perpetual and irrevocable."
So, what that actually means is, the entire part before is moot, if Streem isn't giving you access to REMOVE stuff. Which in the previous paragraph of the TOS, they say they don't have to (and won't give you access to REMOVE data). They may let you delete it, but not remove it. Legal stuff is fun to parse and written like this so they have loopholes.
How they behave and act according to their TOS is complete speculation at this point. My concerns are that their TOS is giving them the keys to the kingdom and asking me to trust them. If they only wanted these permissions to stream it, then say that. If they want permissions to transcode it, then say that. If it is just for their use, then don't say they can give other companies access/permissions to it.
The restriction line also doesn't apply at all. You simply start an affiliate company that does music promotion, then it is within the business line. The terms are a serious joke and horrible for customers. No one should trust a company with their data when the company is taking complete control and ownership of the data, with no restrictions or ability to revoke permission (even when deleting it).
Other storage companies (that I will work with) do not prevent me from using my own encryption to protect the data. So unless they break my encryption, my data is useless to them. Streem doesn't allow encryption, so this isn't like other storage companies. It seems like Streem is using this just to gather lots of content and sell it for profit, advertising and targeting purposes. Really scary...